## Description

- Updated DB-For-My-SQL-Flexible-Server CMK implementation
- Implemented AVM-Common-Types

Linked to 
- Update CMK implementations as per
https://github.com/Azure/bicep-registry-modules/issues/2842#issuecomment-2423679879
- Docs Update: https://github.com/Azure/Azure-Verified-Modules/pull/1683
- UDT update: https://github.com/Azure/bicep-registry-modules/pull/3724

## Pipeline Reference

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| Pipeline |
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[![avm.res.db-for-my-sql.flexible-server](https://github.com/AlexanderSehr/bicep-registry-modules/actions/workflows/avm.res.db-for-my-sql.flexible-server.yml/badge.svg?branch=users%2Falsehr%2FcmkUpdateDBForMySQLFlexibleServer&event=workflow_dispatch)](https://github.com/AlexanderSehr/bicep-registry-modules/actions/workflows/avm.res.db-for-my-sql.flexible-server.yml)
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## Type of Change

<!-- Use the checkboxes [x] on the options that are relevant. -->

- [ ] Update to CI Environment or utilities (Non-module affecting
changes)
- [x] Azure Verified Module updates:
- [ ] Bugfix containing backwards-compatible bug fixes, and I have NOT
bumped the MAJOR or MINOR version in `version.json`:
- [ ] Someone has opened a bug report issue, and I have included "Closes
#{bug_report_issue_number}" in the PR description.
- [ ] The bug was found by the module author, and no one has opened an
issue to report it yet.
- [ ] Feature update backwards compatible feature updates, and I have
bumped the MINOR version in `version.json`.
- [ ] Breaking changes and I have bumped the MAJOR version in
`version.json`.
  - [ ] Update to documentation