Repository: moby/moby (language: go)

Issue:
Empty string not allowed for "Isolation" in Swagger specs
### Description

The swagger.yaml says that Isolation must be one of default|process|hyperv
```
          # Applicable to Windows
          Isolation:
            type: "string"
            description: |
              Isolation technology of the container. (Windows only)
            enum:
              - "default"
              - "process"
              - "hyperv"
```
But on non-windows systems, this value can (will always?) be empty leading to invalid states for code auto-generated from the api specs.

### Reproduce

1. generate code e.g. with `openapi-generator-cli`
2. Inspect container on non-windows system
3. get error about invalid value for Isolation (`""`)

### Expected behavior

`""` should be marked as valid value for Isolation, or non-windows system should return "default".

### docker version

```bash
Client: Docker Engine - Community
 Version:           25.0.3
 API version:       1.44
 Go version:        go1.21.6
 Git commit:        4debf41
 Built:             Tue Feb  6 21:13:09 2024
 OS/Arch:           linux/amd64
 Context:           default

Server: Docker Engine - Community
 Engine:
  Version:          25.0.3
  API version:      1.44 (minimum version 1.24)
  Go version:       go1.21.6
  Git commit:       f417435
  Built:            Tue Feb  6 21:13:09 2024
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.6.28
  GitCommit:        ae07eda36dd25f8a1b98dfbf587313b99c0190bb
 runc:
  Version:          1.1.12
  GitCommit:        v1.1.12-0-g51d5e94
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0
```


### docker info

```bash
Client: Docker Engine - Community
 Version:    25.0.3
 Context:    default
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.12.1
    Path:     /usr/libexec/docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v2.24.5
    Path:     /usr/libexec/docker/cli-plugins/docker-compose

Server:
 Containers: 70
  Running: 30
  Paused: 0
  Stopped: 40
 Images: 131
 Server Version: 25.0.3
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Using metacopy: false
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: systemd
 Cgroup Version: 2
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: ae07eda36dd25f8a1b98dfbf587313b99c0190bb
 runc version: v1.1.12-0-g51d5e94
 init version: de40ad0
 Security Options:
  apparmor
  seccomp
   Profile: builtin
  cgroupns
 Kernel Version: 6.5.0-18-generic
 Operating System: Ubuntu 22.04.3 LTS
 OSType: linux
 Architecture: x86_64
 CPUs: 32
 Total Memory: 124.9GiB
 Name: jkubuntu2204
 ID: 82d03fb7-29c1-45cf-9643-d36f566767ae
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false
```


### Additional Info

_No response_


Discussion / hints:

Fix patch:
diff --git a/api/swagger.yaml b/api/swagger.yaml
index 974fbf12e2d60..fb6445ab9d9fe 100644
--- a/api/swagger.yaml
+++ b/api/swagger.yaml
@@ -1195,6 +1195,7 @@ definitions:
               - "default"
               - "process"
               - "hyperv"
+              - ""
           MaskedPaths:
             type: "array"
             description: |
@@ -4185,6 +4186,7 @@ definitions:
               - "default"
               - "process"
               - "hyperv"
+              - ""
           Init:
             description: |
               Run an init inside the container that forwards signals and reaps
@@ -5755,6 +5757,7 @@ definitions:
           - "default"
           - "hyperv"
           - "process"
+          - ""
       InitBinary:
         description: |
           Name and, optional, path of the `docker-init` binary.


Test patch: