chore: (v1.2.636-rc8.1) disable unprefixed_malloc_on_supported_platforms

[dantengsky]

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Summary

Disable (remove) cargo feature tikv-jemalloc-sys/unprefixed_malloc_on_supported_platforms to prevent lz4-sys from using jemalloc's calloc, as significant performance regressions were observed in the flight RPC compression between version 636 and version 307.

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - use existing tests

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

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This change is