Add summary job to run_all_tests workflow

[pandu-k]

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

• CI update and bug fix

What is the current behavior? (You can also link to an open issue here)

• run_all_tests has no summary job, which reflects if all the tests passed or failed
• This prevents us from having a branch protection status check on this workflow.
• We cannot put branch protection status checks on each individual test workflow because these workflows do not run for markdown-only changes. This means that markdown-only PRs will never be OK'd for merging.

What is the new behavior (if this is a feature change)?

• There is now a summary job, which passes only if all the tests passed or were skipped. Skipping occurs iff the changes only affected markdown files.

Have unit tests been run against this PR? (Has there also been any additional testing?)

Yes. Manual tests:

• Test summary correctly failed if unit tests failed: https://github.com/marqo-ai/marqo/actions/runs/5962528112/job/16175500826 (attempt 1)
• We can rerun the failed workflow: https://github.com/marqo-ai/marqo/actions/runs/5962528112 (attempt 2). Only the failed test workflows rerun. Test summary correctly passes

We need to also check if markdown-only changes skips testing, and the test summary correctly passes. However, we need this update merged into mainline and then have a markdown-only PR into mainline approved in order to test this.

Other information

• To rerun a failed test, restart the start-ec2-runner job that belongs to failed test workflow, not the test job itself:
  

Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes/features)
• Docs have been added / updated (for bug fixes / features)