Deprecate 24 Webcast pages - Batch 1

## Goal
We would like to deprecate the following solutions pages because they have no meaningful traffic from any source and no backlinks.

|  Webcast Pages to Deprecate                                                    |
|------------------------------------------------------------------------------------------------|
| https://about.gitlab.com/webcast/adoption-paths-portuguese/                                 |
| https://about.gitlab.com/webcast/adoption-paths-spanish/                                    |
| https://about.gitlab.com/webcast/agile-transformation/                                      |
| https://about.gitlab.com/webcast/auto-devops/                                               |
| https://about.gitlab.com/webcast/automate-security-ci/                                      |
| https://about.gitlab.com/webcast/avantages-du-devsecops-fr/                                 |
| https://about.gitlab.com/webcast/avoid-devops-tax/                                          |
| https://about.gitlab.com/webcast/aws-tmobile-gitlab/                                        |
| https://about.gitlab.com/webcast/breakthrough-devops-successful-devops-adoption-strategies/ |
| https://about.gitlab.com/webcast/cicd-in-ihrer-organisation/                                |
| https://about.gitlab.com/webcast/critical-workloads-k8-clusters/                            |
| https://about.gitlab.com/webcast/customer-success/ha-geo-setup/                             |
| https://about.gitlab.com/webcast/dev-sec/                                                   |
| https://about.gitlab.com/webcast/devops-automation/                                         |
| https://about.gitlab.com/webcast/devsecops-livestream/                                      |
| https://about.gitlab.com/webcast/digital-devops-series-reduce-costs/                        |
| https://about.gitlab.com/webcast/digital-transformation-northwestern-mutual/                |
| https://about.gitlab.com/webcast/fintech-developer-forum/                                   |
| https://about.gitlab.com/webcast/gary-gruver-discussion/                                    |
| https://about.gitlab.com/webcast/gitlab-premium-cicd/                                       |
| https://about.gitlab.com/webcast/gitlab-premium-implementation/                             |
| https://about.gitlab.com/webcast/gitlab-premium-security/                                   |
| https://about.gitlab.com/webcast/gitops-gitlab-aws-helecloud/                               |
| https://about.gitlab.com/webcast/gitops-gitlab-pulumi/                                      |

These pages were defined in the [IA Refresh Content Audit](https://gitlab.com/gitlab-com/marketing/digital-experience/buyer-experience/-/issues/354). You can find them in the [Cleaned audit - Phase 1 - website refresh spreadsheet](https://docs.google.com/spreadsheets/d/1fCyFV8gHQrE2EWDZNr801RMJiPTIIG-Wcrvd_sPadSM/edit#gid=116929303) in the "Delete" sheet. 

### Jobs To Be Done
* **Situation**: *Pages listed above to removed from the marketing site and if a user hits that URL, they are presented with a 404 page*
* **Motivation**: *We want to reduce the number of pages in the marketing site*
* **Outcome**: *So we can be efficient*

## DCI
[DRI, Consulted, Informed](https://about.gitlab.com/handbook/people-group/directly-responsible-individuals/#dri-consulted-informed-dci)

- [ ] DRI: `TBD`
- [ ] Consulted: @laurenbarker @hsmith-watson 
- [ ] Informed: `Everyone`

## In scope
What is within scope of this request?

- [ ] Remove the listed pages. They most likely exist in the www-gitlab-com repository.
- [ ] Mark the pages as "complete" in the [Cleaned audit - Phase 1 - website refresh spreadsheet] once removed

## Requirements
What are the requirements for this request? Checklist below is an example of common requirements, please check all that apply and adjust as necessary:

- [ ] Copy writing
- [ ] Illustration
- [ ] Custom Graphics
- [ ] Research
- [ ] Data / Analytics
- [ ] UX Design
- [x] Engineering

Story points: 2.0