Add DRA version bump

[ninalee12]

Summary of your changes

Hi Team,

This PR is the first phase of the version-bump automation rollout as mentioned in #mission-control. It introduces a generalized Buildkite pipeline for service teams in the DRA process. The baseline pipeline includes a block step that waits for each team to unblock before polling for DRA artifacts using a buildkite plugin json-watcher-buildkite-plugin for the polling.

Related Issues

• Version Bump Automation Rollout #4024

Checklist

• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary README/documentation (if appropriate)

Introducing a new rule?

• Generate rule metadata using this script
• Add relevant unit tests
• Generate relevant rule templates using this script, and open a PR in elastic/packages/cloud_security_posture

[mergify]

This pull request does not have a backport label. Could you fix it @ninalee12? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-v./d./d./d is the label to automatically backport to the 8./d branch. /d is the digit
• backport-active-all is the label that automatically backports to all active branches.
• backport-active-8 is the label that automatically backports to all active minor branches for the 8 major.
• backport-active-9 is the label that automatically backports to all active minor branches for the 9 major.