Reapply "[libc++][FTM] Added FTMs from Sofia Meeting 202506 (#239614)" (#242088) (#242210)

This reverts commit 034b938cbbaa78957e1a94b8ef56bfeb6c3a2021.

Removed the offending `<meta>` bits for now to resolve the reported
issue:
https://github.com/llvm/llvm-project/pull/239614#issuecomment-6837663036

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Co-authored-by: Hristo Hristov <zingam@outlook.com>
GitOrigin-RevId: 12226ef225791e618f8affd26fa4634f7ceae410
9 files changed