…bdirectory (fixes apache#11321) (apache#11323)

This is a fix that adds validation to prevent reading parent POMs
that are located above the discovered root directory. This prevents
infinite loops when a .mvn directory exists in a subdirectory and
Maven is invoked with -f pointing to that subdirectory.

The fix includes:
- Validation in doReadFileModel() to check parent POM location
- Validation in getEnhancedProperties() to prevent infinite loops
- Helper method isParentWithinRootDirectory() for path validation
- Integration test to reproduce and verify the fix

(cherry picked from commit 714fc51)

The integration test for apacheGH-11321 needs to specify that it only runs
on Maven 4.0.0 and later, since the fix is only available in those
versions. This prevents the test from running on older Maven versions
where the fix is not present, which was causing CI failures.

The test validates that Maven properly rejects setups where a parent
POM is located above the root directory when a .mvn directory exists
in a subdirectory.