chore(CI): Test against stable27 branches of needed apps

Signed-off-by: Joas Schilling <coding@schilljs.com>

.drone.yml

@@ -1240,7 +1240,7 @@ steps:
   commands:
     # JavaScript files are not used in integration tests, so it is not needed to
     # build them.
-    - git clone --depth 1 --branch master https://github.com/nextcloud/spreed apps/spreed
+    - git clone --depth 1 --branch stable27 https://github.com/nextcloud/spreed apps/spreed
     - cd apps/spreed
     - composer --version
     - composer self-update --2

.github/workflows/performance.yml

@@ -52,7 +52,7 @@ jobs:
             curl -s -u test:test -T README.md http://localhost:8080/remote.php/dav/files/test/new_file.txt
             curl -s -u test:test -X DELETE http://localhost:8080/remote.php/dav/files/test/new_file.txt
           output: before.json
-          profiler-branch: master
+          profiler-branch: stable27
 
       - name: Apply PR
         run: |
@@ -74,7 +74,7 @@ jobs:
             curl -s -u test:test -T README.md http://localhost:8080/remote.php/dav/files/test/new_file.txt
             curl -s -u test:test -X DELETE http://localhost:8080/remote.php/dav/files/test/new_file.txt
           output: after.json
-          profiler-branch: master
+          profiler-branch: stable27
           compare-with: before.json
 
       - name: Upload profiles

tests/acceptance/run-local.sh

@@ -64,7 +64,7 @@ if [ "$1" = "--acceptance-tests-dir" ]; then
 fi
 
 ACCEPTANCE_TESTS_CONFIG_DIR="../../$ACCEPTANCE_TESTS_DIR/config"
-DEV_BRANCH="master"
+DEV_BRANCH="stable27"
 
 # "--timeout-multiplier N" option can be provided to set the timeout multiplier
 # to be used in ActorContext.