ci: Add CI env var check to debug workflow

Also checking the CI environment variable which might trigger TMT verbose mode.

Assisted-by: Claude Code (Sonnet 4.5)

Author: cgwalters

.github/workflows/debug-tmt.yml

@@ -36,11 +36,12 @@ jobs:
           echo "=== TMT version ==="
           tmt --version
 
-          echo "=== Critical: Check RUNNER_DEBUG and ENABLE_RUNNER_TRACING ==="
+          echo "=== Critical: Check RUNNER_DEBUG, ENABLE_RUNNER_TRACING, and CI ==="
           echo "RUNNER_DEBUG=${RUNNER_DEBUG:-<not set>}"
           echo "ENABLE_RUNNER_TRACING=${ENABLE_RUNNER_TRACING:-<not set>}"
           echo "ACTIONS_STEP_DEBUG=${ACTIONS_STEP_DEBUG:-<not set>}"
           echo "TMT_DEBUG=${TMT_DEBUG:-<not set>}"
+          echo "CI=${CI:-<not set>}"
 
           echo "=== All environment variables (full list) ==="
           env | sort