[9.0] TEST Segregate test methods in ThreadPoolMergeExecutorServiceDiskSpaceTests wrt to the mocked filesystems (#130430) #130527
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Previously, out of zealousness for testing efficiency, the mocked filesystems were reused across the test suite class. But this makes tests liable to interference wrt to filesystem stats calls. Moreover, if one test fails, it can trigger failures in other test methods. This PR recreates the mocked filesystems for every test method. Fixes elastic#129296 elastic#130205
albertzaharovits
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albertzaharovits
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backport-90-segrate_merge_executor_disk_space_tests
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Previously, out of zealousness for testing efficiency, the mocked filesystems were reused across the test suite class. But this makes tests liable to interference wrt to filesystem stats calls. Moreover, if one test fails, it can trigger failures in other test methods.
This PR recreates the mocked filesystems for every test method.
Backport of #130430
Fixes #129296 #130205