CG-10694: Remove lowside + enterprise from codegen.git

[caroljung-cg]

Motivation

Removes GHE and github app related code from git module

Testing

Integration testing

Please check the following before marking your PR as ready for review

• I have added tests for my changes
• I have updated the documentation or added new documentation as needed

[codecov]

Codecov Report

Attention: Patch coverage is 39.86486% with 89 lines in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/codegen/git/clients/git_repo_client.py	16.66%	35 Missing ⚠️
src/codegen/git/utils/clone.py	0.00%	21 Missing ⚠️
.../codegen/git/repo_operator/remote_repo_operator.py	23.07%	10 Missing ⚠️
src/codegen/git/clients/github_client.py	57.14%	6 Missing ⚠️
src/codegen/runner/sandbox/repo.py	16.66%	5 Missing ⚠️
src/codegen/runner/sandbox/executor.py	33.33%	4 Missing ⚠️
src/codegen/runner/sandbox/runner.py	33.33%	4 Missing ⚠️
src/codegen/git/utils/clone_url.py	50.00%	2 Missing ⚠️
src/codegen/git/configs/config.py	50.00%	1 Missing ⚠️
src/codegen/git/repo_operator/repo_operator.py	83.33%	1 Missing ⚠️

Additional details and impacted files