TSAN reports data race in many FullTextIndex tests

[gengliqi]

Bug Report

See details in https://ci.pingcap.net/blue/organizations/jenkins/tiflash-sanitizer-daily/detail/tiflash-sanitizer-daily/2643/pipeline/.

• FullTextIndex/FullTextIndexDMFileTestWithNoIndex.OnePack/0
• FullTextIndex/FullTextIndexSegmentTest1.StableOnly/0
• FullTextIndex/FullTextIndexDMFileTestWithNoIndex.OnePack/2
• FullTextIndex/FullTextIndexSegmentTest1.StableOnly/1
• FullTextIndex/FullTextIndexSegmentDataLocationTest.Basic/4
• FullTextIndex/FullTextIndexDMFileTestWithNoIndex.OnePackWithDuplicate/0
• FullTextIndex/FullTextIndexSegmentTest1.HybridStableAndDelta/0
• FullTextIndex/FullTextIndexSegmentTest1.HybridStableAndDelta/1
• FullTextIndex/FullTextIndexDMFileTestWithNoIndex.OnePackWithDuplicate/2
• FullTextIndex/FullTextIndexDMFileTestWithNoIndex.OnePackRanked/0
• FullTextIndex/FullTextIndexSegmentDataLocationTest.Basic/9
• FullTextIndex/FullTextIndexDMFileTestWithNoIndex.OnePackRanked/2

[JaySon-Huang]

The fulltext index related codes are disabled by default #10325