Avoid cache collisions by caching configurable schemas per server.

Closes #3491736

added 7 commits

• 899cb9c3...1274050d - 5 commits from branch project:8.x-4.x
• c9e7b10b - Merge remote-tracking branch 'origin/8.x-4.x' into 3491736-cache-collision-when
• 77534f5c - Add a test.

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added 3 commits

• db280a04 - Update documentation to prevent confusion between a GraphQL schema and the ID of a schema plugin.
• cbafa009 - Adhere to coding standards.
• f1b9787f - Address PHPStan warnings.

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• 4ca6179c - Make linters happy.

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• 30ddfc16 - Insert coin to play another round of PHPStan Whack-A-Mole.

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• 0f004717 - PHPStan complains about a missing method but it exists on the parent class.

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Looks good to me. The test case is not easy to understand, but should be fine. Will test a bit locally and then I think we can merge.

approved this merge request

resolved all threads

added 1 commit

• 8ad714ba - use class syntax

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reset approvals from @klausi by pushing to the branch

merged