fix: dependency error message rendering

[vvagaytsev]

What this PR does / why we need it:

Fix the case when an action depends on runtime outputs of a disabled action.

Error rendering example before fix:

Run type=exec name=run-task depends on one or more runtime outputs from action
             key() {
        return actionReferenceToString(this);
    }, which is disabled. Please either remove the reference or enable the action.

Error rendering example after fix:

Run type=exec name=run-task depends on one or more runtime outputs from action deploy.tf-production, which is disabled. Please either remove the reference or enable the action.

The action.key function was not called in the error message, so it was rendered as a part of the code. Now it's fixed.
This PR also fixes some action name highlighting and removes unnecessary newline breaks from the error message.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer: