Fix CI running out of disk space. (#2477)

* Debug disk space usage.

* Disable downloading sources.

* Limit cache size.

* Set 3 threads.

* Remove old Xcode versions.

* Refactor.

* Change approach.

* Tweak.

* Change approach.

* Test.

* Remove Xcode 15.

* Tweak.

* Test.

* Test.

* Test.

* Simplify.

.github/workflows/ci.yml

@@ -11,6 +11,8 @@ concurrency:
 env:
     CI: true
     JAVA_VERSION: 17
+    ORG_GRADLE_IDE_DOWNLOADJAVADOC: false
+    ORG_GRADLE_IDE_DOWNLOADSOURCES: false
 jobs:
     checks:
         name: Checks
@@ -52,6 +54,15 @@ jobs:
                   cache-overwrite-existing: true
                   gradle-home-cache-cleanup: true
 
+            - name: Remove unused Xcode versions
+              run: |
+                  echo "Currently installed Xcode versions:"
+                  find /Applications -name "Xcode*" -maxdepth 1 -mindepth 1
+                  echo "Removing all except the currently selected Xcode version..."
+                  ls -d /Applications/Xcode* | grep -v "$(xcode-select -p | sed 's:/Contents/Developer::')" | xargs -P 3 -I {} sudo rm -rf "{}"
+                  echo "Available Xcode versions after removal:"
+                  find /Applications -name "Xcode*" -maxdepth 1 -mindepth 1
+
             - name: Unit tests
               run: ./gradlew allTests testDebugUnitTest validateDebugScreenshotTest verifyPaparazziDebug verifyRoborazziDebug verifyRoborazziJvm