Simplify multi status checks

[ferrarimarco]

Proposed Changes

1. Simplify the conditions to enable validation of the variables that we need to submit status checks. These checks and related logging run only if MULTI_STATUS=true and RUN_LOCAL=false.
2. Avoid emitting confusing message logs about status reports when RUN_LOCAL=false.

Readiness Checklist

Author/Contributor

• I included all the needed documentation for this change.
• I provided the necessary tests.

Reviewing Maintainer

• Label as breaking if this is a large, fundamental change.
• Label as either: automation, bug, documentation, enhancement, infrastructure.

BEGIN_COMMIT_OVERRIDE
fix: simplify multi status checks (#4958)
END_COMMIT_OVERRIDE

[ferrarimarco]

We need #4960 before this one.

[ferrarimarco]

@zkoppert going ahead with this one because it's a simple change so you can focus on reviewing other PRs :)