Issue:
Bug: [REFACTOR] wrap the encryption and file storage interface client in appstate with `Arc` as opposed to `Box`



Currently, the encryption interface and file storage interface client is wrapped with `Box`. These clients live in AppState. Since state is cloned for each api handler, wrap the clients in `Arc` so that the internal data doesn't gets cloned.

Pull request description:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [ ] Enhancement
- [x] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->
Currently, the encryption interface and file storage interface client is wrapped with `Box`. These clients live in `AppState`. Since state is cloned for each api handler, wrapping the clients in Arc will help in not cloning the actual internal data rather maintaining a counter on the single client instance.

### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

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1. `config`
2. `crates/router/src/configs`
3. `loadtest/config`
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## Motivation and Context
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## How did you test it?
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Did you write an integration/unit/API test to verify the code changes?
Or did you test this change manually (provide relevant screenshots)?
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Basic sanity testing should suffice

## Checklist
<!-- Put an `x` in the boxes that apply -->

- [x] I formatted the code `cargo +nightly fmt --all`
- [x] I addressed lints thrown by `cargo clippy`
- [x] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible


Testing:

Basic sanity testing should suffice

Patch:
diff --git a/crates/drainer/src/settings.rs b/crates/drainer/src/settings.rs
index 311cee0cede..e64b5dbd4ad 100644
--- a/crates/drainer/src/settings.rs
+++ b/crates/drainer/src/settings.rs
@@ -31,7 +31,7 @@ pub struct CmdLineConf {
 #[derive(Clone)]
 pub struct AppState {
     pub conf: Arc<Settings<RawSecret>>,
-    pub encryption_client: Box<dyn EncryptionManagementInterface>,
+    pub encryption_client: Arc<dyn EncryptionManagementInterface>,
 }
 
 impl AppState {
diff --git a/crates/external_services/src/file_storage.rs b/crates/external_services/src/file_storage.rs
index fb419b6ec64..e551cfee2af 100644
--- a/crates/external_services/src/file_storage.rs
+++ b/crates/external_services/src/file_storage.rs
@@ -2,7 +2,10 @@
 //! Module for managing file storage operations with support for multiple storage schemes.
 //!
 
-use std::fmt::{Display, Formatter};
+use std::{
+    fmt::{Display, Formatter},
+    sync::Arc,
+};
 
 use common_utils::errors::CustomResult;
 
@@ -39,11 +42,11 @@ impl FileStorageConfig {
     }
 
     /// Retrieves the appropriate file storage client based on the file storage configuration.
-    pub async fn get_file_storage_client(&self) -> Box<dyn FileStorageInterface> {
+    pub async fn get_file_storage_client(&self) -> Arc<dyn FileStorageInterface> {
         match self {
             #[cfg(feature = "aws_s3")]
-            Self::AwsS3 { aws_s3 } => Box::new(aws_s3::AwsFileStorageClient::new(aws_s3).await),
-            Self::FileSystem => Box::new(file_system::FileSystem),
+            Self::AwsS3 { aws_s3 } => Arc::new(aws_s3::AwsFileStorageClient::new(aws_s3).await),
+            Self::FileSystem => Arc::new(file_system::FileSystem),
         }
     }
 }
diff --git a/crates/external_services/src/managers/encryption_management.rs b/crates/external_services/src/managers/encryption_management.rs
index 4612190926c..678239c60b1 100644
--- a/crates/external_services/src/managers/encryption_management.rs
+++ b/crates/external_services/src/managers/encryption_management.rs
@@ -2,6 +2,8 @@
 //! Encryption management util module
 //!
 
+use std::sync::Arc;
+
 use common_utils::errors::CustomResult;
 use hyperswitch_interfaces::encryption_interface::{
     EncryptionError, EncryptionManagementInterface,
@@ -42,12 +44,12 @@ impl EncryptionManagementConfig {
     /// Retrieves the appropriate encryption client based on the configuration.
     pub async fn get_encryption_management_client(
         &self,
-    ) -> CustomResult<Box<dyn EncryptionManagementInterface>, EncryptionError> {
+    ) -> CustomResult<Arc<dyn EncryptionManagementInterface>, EncryptionError> {
         Ok(match self {
             #[cfg(feature = "aws_kms")]
-            Self::AwsKms { aws_kms } => Box::new(aws_kms::core::AwsKmsClient::new(aws_kms).await),
+            Self::AwsKms { aws_kms } => Arc::new(aws_kms::core::AwsKmsClient::new(aws_kms).await),
 
-            Self::NoEncryption => Box::new(NoEncryption),
+            Self::NoEncryption => Arc::new(NoEncryption),
         })
     }
 }
diff --git a/crates/router/src/routes/app.rs b/crates/router/src/routes/app.rs
index 83d8c714e92..8d88d9c4b26 100644
--- a/crates/router/src/routes/app.rs
+++ b/crates/router/src/routes/app.rs
@@ -82,7 +82,7 @@ pub struct SessionState {
     pub email_client: Arc<dyn EmailService>,
     #[cfg(feature = "olap")]
     pub pool: AnalyticsProvider,
-    pub file_storage_client: Box<dyn FileStorageInterface>,
+    pub file_storage_client: Arc<dyn FileStorageInterface>,
     pub request_id: Option<RequestId>,
     pub base_url: String,
     pub tenant: String,
@@ -144,8 +144,8 @@ pub struct AppState {
     #[cfg(feature = "olap")]
     pub opensearch_client: Arc<OpenSearchClient>,
     pub request_id: Option<RequestId>,
-    pub file_storage_client: Box<dyn FileStorageInterface>,
-    pub encryption_client: Box<dyn EncryptionManagementInterface>,
+    pub file_storage_client: Arc<dyn FileStorageInterface>,
+    pub encryption_client: Arc<dyn EncryptionManagementInterface>,
 }
 impl scheduler::SchedulerAppState for AppState {
     fn get_tenants(&self) -> Vec<String> {