chore(ci): new CI action trigger for REACT testing workflow (#4435)

* React test trigger

* Delete outdated CI trigger

* Fixing a trigger event

* Dummy rule updates

* Fix workflow name

* Fix typo in curl command

* Use correct token

* Using full workflow filename with extension

* Simplified JSON in curl request

* Using a correct value for branch

* Use a correct ref for a workflow

* Fix for invalid field name in a dispatch data

* Simplify json body

* Revert "Dummy rule updates"

This reverts commit 6c18c5b.

Author: traut

.github/workflows/react-tests-dispatcher.yml

@@ -0,0 +1,23 @@
+name: REACT Tests Dispatcher
+
+on:
+  pull_request:
+    paths:
+      - 'rules/**/*.toml'
+
+jobs:
+  dispatch:
+    name: Run REACT tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Trigger REACT workflow
+        env:
+          REACT_WORKFLOW_ID: "detection-rules-tests.yml"
+        run: |
+            curl -X POST \
+            -H "Accept: application/vnd.github.everest-preview+json" \
+            -H "Content-Type: application/json" \
+            -H "Authorization: token ${{ secrets.WRITE_DETECTION_RULES_REACT_TOKEN }}" \
+            "https://api.github.com/repos/elastic/react/actions/workflows/$REACT_WORKFLOW_ID/dispatches" \
+            -d '{"ref": "main", "inputs": {"pr_branch": "${{ github.head_ref || github.ref_name }}", "pr_id": "${{ github.event.number }}"}}'
+            exit $?