ci: Disambiguate GitHub job IDs to fix required status checks

[ashovlin]

Issue #, if available: N/A

Description of changes: We noticed while attempting to merge #813 that we were unable to.

• GitHub checks are failing because the PR is from a fork. Typically a maintainer will review, run tests locally if necessary, then merge despite the failures.
• However we recently cleaned up our GitHub team structure, which removed the ability to merge despite failing checks for most maintainers.
• This repository is configured to require on the build status check, but we had used that name across different actions, so more were required than what we intended.

I think this was unintentional, so I'm renaming these actions so that the only build one is the build+unit tests.

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