[DDO-3641] Rework for required checks

[jack-r-warren]

The GHA in this repo are very fancy... so fancy that it actually makes it impossible to use GitHub's "require the following checks before merge to main," because whether a check would run was always dependent on the code the PR changed.

This PR adjusts the PR-run checks to always run on PRs, even if not strictly necessary, so we can gate on them easier.

This PR also makes a few other tweaks:

• Configures Dependabot to include an "ongoing" ticket in its commit messages
• Configures the build action to check that client libraries can be built when run in a PR
• Reorders the build steps slightly to initiate the GCP auth after commits have already been made, as an extra bonus protection against committing GCP credentials
• Renames GitHub Actions to make the folder a bit easier to read (since humans do read it!)
• Adds a very simple action to check if PR titles contain a ticket

[github-actions]

No API changes detected

[github-actions]

Published image from d66b6c5 (merge b883f07):

us-central1-docker.pkg.dev/dsp-artifact-registry/sherlock/sherlock:v1.3.25-b883f07
us-central1-docker.pkg.dev/dsp-devops-super-prod/sherlock/sherlock:v1.3.25-b883f07

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud