chore: Update CMAKE to 3.22.1 for gitlab builds.

[fuzzybinary]

What does this PR do?

Some plugin builds are failing because we're missing CMAKE 3.22.1. Update the Dockerfile so that CMAKE 3.22.1 is always installed.

Review checklist (to be filled by reviewers)

• [ ] Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• [ ] Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• [ ] Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

Merging #221 (8c2a5a3) into develop (5895876) will increase coverage by 0.15%. The diff coverage is n/a.

:exclamation: Current head 8c2a5a3 differs from pull request most recent head 5bc4c97. Consider uploading reports for the commit 5bc4c97 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #221 +/- ## ============================================= + Coverage 78.05% 78.20% +0.15% - Complexity 186 187 +1 ============================================= Files 22 22 Lines 665 665 Branches 85 85 ============================================= + Hits 519 520 +1 Misses 116 116 + Partials 30 29 -1 ``` [see 1 file with indirect coverage changes](https://app.codecov.io/gh/DataDog/dd-sdk-android-gradle-plugin/pull/221/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DataDog)