Removing all references of hz_tracing V2 from the codebase (#54062)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/54062

Renaming every V2 tracing macro so that it no longer has `_V2` suffixed. This diff completes the migration of the hz_tracing V1->V2 API.

This is a very large diff but is comprised of mostly mechanical changes. Most of these files were edited using `find` and `sed`, specifically:
`find . -type f \( -name "*.h" -o -name "*.cpp" \) -exec sed -i 's/HZT_\(.*\)_V2/HZT_\1/g' {} +`.

Since this is just a rename, no difference in functionality is expected.

Changelog: [Internal]

Differential Revision: D83808657

fbshipit-source-id: 64effdf701b1ff600185abfb737f9c0fa2250ddf