Revert "[sanitizer] Define SANITIZER_GLIBC to refine SANITIZER_LINUX feature detection and support musl"

...and follow-ups. It still doesn't build on Android, see https://reviews.llvm.org/D93848#2476310

This reverts commit a92d01534f1c4fb79210975573e774d0393f2533.
This reverts commit 52d7e183bf25ea38e1149e39e19d21e6212e701f.
This reverts commit 34489da81b39972b40d2ff5581fe48911339406e.

GitOrigin-RevId: fe9976c02c09f105751f787ec998abeb3414a235
13 files changed