Disable LockTests.testReadWriteFileLock
Disable LockTests.testReadWriteFileLock

This test may fail spuriously if a reader thread runs before any writers
were able to write the initial value to the file. Disable the test until
it can be fixed. We saw the same issue with FileSystemTests in the past.

rdar://78461378

apple/swift-tools-support-core,apple/swift-tools-support-core,apple/swift-tools-support-core,apple/swift-tools-support-core