[1.9.x] Wait for CDT binary.

[scottarnette]

Change Description

PR #338 introduced logic to wait for the dependent Docker image with EOS installed as listed in pipeline.jsonc to be built and pushed if it does not exist. Build #978 illustrated a need for the same logic to be applied when downloading the dependent CDT binary:

• Added logic to retry downloading the dependent CDT binary.
• Improved logging output:
  • Logs show the command being used to download CDT.
  • Logs detail failures when downloading CDT every minute, including a link to the expected build which should have created the artifact.
• Updated build/test commands to support new logic:
  • The download is retried until it succeeds. The artifact is now mounted into the build/test container, meaning we no longer need to download it at that time.
• Increased timeout to support extended time of CDT builds.

See:
Build #999 | This exercises the retry functionality when downloading CDT. It waits for an artifact to be produced from this CDT build.
Build #1002 | This PR build.
Build #421 | Travis build.

Deployment Changes

• Deployment Changes

API Changes

• API Changes

Documentation Additions

• Documentation Additions