Switch master to main in CI tools and dev tools

[dstrain115]

• Switched master to main branch for better terminology and best practices.
• This should catch most of the references in non-documentation. (will fix documentation in a later PR).

[codecov[bot]]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (3c6a305) 97.80% compared to head (0076383) 97.80%.

:exclamation: Current head 0076383 differs from pull request most recent head b3e3d2a. Consider uploading reports for the commit b3e3d2a to get more accurate results

Files	Patch %	Lines
dev_tools/git_env_tools.py	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #6363 +/- ## ======================================= Coverage 97.80% 97.80% ======================================= Files 1111 1111 Lines 96878 96878 ======================================= Hits 94756 94756 Misses 2122 2122 ```

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