Fix Composite annotations not appearing as expected

[thboop]

Description

This PR fixes an issue where timeline records for composite steps were being sent up to the server. They weren't intended to do that, but the addIssue function would send them up. To remedy this, we now keep track of issues on composite execution contexts, and combine them in the composite action handler. We also split out the addIssue function, so we don't repeat the validation logic.

See this linked ticket for how to reproduce

[dnatic09]

Looking forward to this being resolved. Our annotations are being lost in composites.

[RobKenis]

Any update on this? We are waiting for this one to get merged.