Simplify hashFiles to single pattern for gradle-wrapper.properties

Use only gradle-wrapper.properties for cache key to avoid hashFiles errors.
This is the most critical file for Gradle cache invalidation as it
determines the Gradle version.

Testing with minimal pattern to isolate the hashFiles issue.

Author: hermannakos

.github/workflows/pr-pipeline.yml

@@ -99,7 +99,7 @@ jobs:
           path: |
             ~/.gradle/caches
             ~/.gradle/wrapper
-          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/gradle-wrapper.properties') }}
           restore-keys: |
             ${{ runner.os }}-gradle-
 
@@ -258,7 +258,7 @@ jobs:
           path: |
             ~/.gradle/caches
             ~/.gradle/wrapper
-          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/gradle-wrapper.properties') }}
           restore-keys: |
             ${{ runner.os }}-gradle-
 
@@ -349,7 +349,7 @@ jobs:
           path: |
             ~/.gradle/caches
             ~/.gradle/wrapper
-          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/gradle-wrapper.properties') }}
           restore-keys: |
             ${{ runner.os }}-gradle-