fix: Add Cockroach DB Module to Testcontainers

[joelhess]

Adds [Cockroach DB] (https://www.cockroachlabs.com/) module to use with Test containers

I had done this previously under https://github.com/testcontainers/testcontainers-python/pull/281, but opted to just redo it rather than try to rebase all the things.

• [x] Create a new feature directory and populate it with the package structure described in the documentation. Copying one of the existing features is likely the best way to get started.
• [x] Implement the new feature (typically in __init__.py) and corresponding tests.
• [x] Update the feature README.rst and add it to the table of contents (toctree directive) in the top-level README.rst.
• [] Add a line [feature name] to the list of components in the GitHub Action workflow in .github/workflows/main.yml to run tests, build, and publish your package when pushed to the main branch.
• [x] Rebase your development branch on main (or merge main into your development branch).
• [x] Add Package to pyproject.toml
• [ ] Add a line -e file:[feature name] to requirements.in and open a pull request. Opening a pull request will automatically generate lock files to ensure reproducible builds (see the pip-tools documentation for details). Finally, run python get_requirements.py --pr=[your PR number] to fetch the updated requirement files (the build needs to have succeeded).

[alexanderankin]

will merge whenever the tests run

[codecov[bot]]

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```diff @@ Coverage Diff @@ ## main #608 +/- ## ======================================= Coverage ? 75.18% ======================================= Files ? 10 Lines ? 548 Branches ? 77 ======================================= Hits ? 412 Misses ? 110 Partials ? 26 ```

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