Split test and archive in CI

Author: hannesa2

.github/workflows/BuildPR.yml

@@ -33,5 +33,7 @@ jobs:
       - name: Show openssl version
         run: |
           openssl version
-      - name: Test and archive project
-        run: xcodebuild -workspace ObjectiveGitFramework.xcworkspace -scheme "ObjectiveGit Mac" test archive ARCHS="x86_64"
+      - name: Archive project
+        run: xcodebuild -workspace ObjectiveGitFramework.xcworkspace -scheme "ObjectiveGit Mac" test ARCHS="x86_64"
+      - name: Test project
+        run: xcodebuild -workspace ObjectiveGitFramework.xcworkspace -scheme "ObjectiveGit Mac" archive ARCHS="x86_64"