Add archive logic for test changed exercises using gradlew job in the java.yml workflow (#3038)

* Save test archive results to results.txt file

* Change test results file format from JSON to TXT

* Use tee to save test results to file

* Remove echo statement for results path

Author: jagdish-15

.github/workflows/java.yml

@@ -68,5 +68,5 @@ jobs:
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02
         with:
           name: test-results
-          path: exercises/**/build/results.json
+          path: exercises/**/build/results.txt
         if: failure()

bin/test-changed-exercise

@@ -43,9 +43,12 @@ for dir in $changed_exercises; do
   echo "=== Running tests for $slug ==="
   echo "========================================"
 
+  results_path="$dir/build/results.txt"
+  mkdir -p "$(dirname "$results_path")"
+
   if [[ $dir == exercises/practice/* ]]; then
-    ./exercises/gradlew -p exercises ":practice:$slug:test"
+    ./exercises/gradlew -p exercises ":practice:$slug:test" 2>&1 | tee "$results_path"
   elif [[ $dir == exercises/concept/* ]]; then
-    ./exercises/gradlew -p exercises ":concept:$slug:test"
+    ./exercises/gradlew -p exercises ":concept:$slug:test" 2>&1 | tee "$results_path"
   fi
 done