Fix Datadog Synthetics CI workflow failing on missing secrets

[Copilot]

The Run Datadog Synthetic tests workflow hard-fails on every PR because DD_API_KEY / DD_APP_KEY secrets are not configured, blocking CI with an unrecoverable action error.

Changes

• Guard step added: checks both secrets via env vars before running Datadog tests
• Conditional execution: test step gated on has_secrets == 'true'; emits a ::warning:: and skips cleanly when secrets are absent
• No behavior change when secrets are properly configured

- name: Check for required Datadog secrets
  id: check-secrets
  env:
    DD_API_KEY: ${{ secrets.DD_API_KEY }}
    DD_APP_KEY: ${{ secrets.DD_APP_KEY }}
  run: |
    if [ -n "$DD_API_KEY" ] && [ -n "$DD_APP_KEY" ]; then
      echo "has_secrets=true" >> $GITHUB_OUTPUT
    else
      echo "has_secrets=false" >> $GITHUB_OUTPUT
      echo "::warning::DD_API_KEY and/or DD_APP_KEY secrets are not configured. Skipping Datadog Synthetic tests."
    fi

- name: Run Datadog Synthetic tests
  if: steps.check-secrets.outputs.has_secrets == 'true'
  uses: DataDog/synthetics-ci-github-action@87b505388a22005bb8013481e3f73a367b9a53eb
  ...

Checklist

• Use the owner account that submitted registrar_reserve to sign the project information, and fill in the signature.
• After each update of the project information, please sign the latest data and submit the signature.
• Add a description for your pr, the description includes the original data.
• Fill up the signature of the original data, signature account to Signature Auto check.

Signature Auto check

Para ID Owner & Signature Account:
<REPLACE THE OWNER>

Data that needs to be signed:
file

Signature Hash: <REPLACE THE SIGNATURE>

[TuneMe81]

Looks good

[TuneMe81]

Polkadot wallet is where all my info

Suggested change

	test_search_query: 'tag:e2e-tests' #Modify this tag to suit your tagging strategy**_[]()
	_**

[TuneMe81]

get rid the datadog