test: add bazel build rule for SelfTest

[c8ef]

Description

This PR primarily accomplishes two tasks:

1. It adds MODULE.bazel.lock to the .gitignore file.
2. It includes a Bazel build rule for SelfTest, which can be utilized with the command bazel test //tests:catch2_self_test.

GitHub Issues

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.09%. Comparing base (53ddf37) to head (31b9a3a).
Report is 2 commits behind head on devel.

Additional details and impacted files

@@           Coverage Diff           @@
##            devel    #2857   +/-   ##
=======================================
  Coverage   91.09%   91.09%           
=======================================
  Files         197      197           
  Lines        8382     8382           
=======================================
  Hits         7635     7635           
  Misses        747      747           

[horenmar]

What's the advantage of having SelfTest build rule in repo, when the main development is done using CMake?

[c8ef]

There may not be much advantage, but I noticed the meson build file for the test case. I believe it would be beneficial to have a corresponding Bazel build rule for those using Bazel.

[horenmar]

Fair enough.

[c8ef]

Thanks!