Move gradle wrapper-validation to top-level workflow to make OSSF scorecard happy

Author: opentelemetry-basic-automation[bot]

.github/workflows/build-common.yml

@@ -47,13 +47,6 @@ jobs:
       - name: Spotless
         run: ./gradlew spotlessCheck ${{ inputs.no-build-cache && '--no-build-cache' || '' }}
 
-  gradle-wrapper-validation:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-
-      - uses: gradle/actions/wrapper-validation@0bdd871935719febd78681f197cd39af5b6e16a6 # v4.2.2
-
   license-check:
     runs-on: ubuntu-latest
     steps:

.github/workflows/validate-gradle-wrappers.yml

@@ -0,0 +1,13 @@
+name: "Validate Gradle Wrappers"
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  validation:
+    name: "Validation"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: gradle/actions/wrapper-validation@0bdd871935719febd78681f197cd39af5b6e16a6 # v4.2.2