[TASK] Also run nightly PHPStan builds with highest dependencies

This allows us to see whether a new PHPStan version causes any baseline
changes, or whether an update of any other dependency brings some
interface changes that affect our type checks.

Resolves: #97955
Releases: main
Change-Id: I436acc5f25331db6783aebdc12c94edbe85f1eed
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75203


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>

Build/gitlab-ci/nightly/integrity.yml

@@ -74,7 +74,7 @@ lint scss ts html:
     - Build/Scripts/runTests.sh -s lintTypescript
     - Build/Scripts/runTests.sh -s lintHtml
 
-phpstan php 8.1:
+phpstan php 8.1 locked:
   stage: integrity
   needs: []
   only:
@@ -86,3 +86,16 @@ phpstan php 8.1:
   script:
     - Build/Scripts/runTests.sh -s composerInstall -p 8.1
     - Build/Scripts/runTests.sh -s phpstan -p 8.1
+
+phpstan php 8.1 max:
+  stage: integrity
+  needs: []
+  only:
+    - schedules
+  cache:
+    key: main-composer-phpstan-max
+    paths:
+      - .cache
+  script:
+    - Build/Scripts/runTests.sh -s composerInstallMax -p 8.1
+    - Build/Scripts/runTests.sh -s phpstan -p 8.1