IOT_DS-8566: fix CLA trigger condition and enable CLA workflow triggers

[Ziegler András (AndrasZiegler)]

This PR updates the CLA Assistant workflow trigger condition and enables trigger events for CLA processing.

Changes:

• Replace the CLA step condition with a guarded expression that handles pull_request_target and qualifying issue_comment events
• Enable issue_comment and pull_request_target triggers when they were commented out

Ticket: IOT_DS-8566

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Note

Low Risk
Workflow-only change that affects when the CLA check runs; low code risk but could impact PR gating if the condition is incorrect.

Overview
Updates the 01-CLA-Assistant GitHub Actions workflow to run the CLA check job only for pull_request_target events or for PR issue_comment events that either request recheck or include the CLA signing text (and guards against non-PR comments).

This moves the conditional from the "CLA Assistant" step to a job-level if, while keeping the existing triggers enabled for issue_comment: created and pull_request_target lifecycle events.

^{Written by Cursor Bugbot for commit 6f61ce3. This will update automatically on new commits. Configure here.}

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud