CI may not catch a docs-testing test regression

[findepi]

Steps to repro

• change a docs file that's tested by a test, such as docs/src/main/sphinx/security/user-mapping.json (this is tested by TestUserMapping.testDocsExample living in trino-main)
• do a code change such that test impact analysis (GIB) does not trigger the test execution, for example change some plugin (e.g. plugin/trino-functions-python/src/main/java/io/trino/plugin/functions/python/JdkLogger.java)

expected

CI fails on the PR, since it would also fail on master once the change is merged

observed

CI passes, as can be seen in

• Test breaking docs semantically on CI #27075