Revert "[CGData] llvm-cgdata (llvm#89884)"

This reverts commit d3fb41d
and forward fix patches because of the issue explained in:
llvm#89884 (comment).

Revert "Fix tests for llvm#89884
(llvm#100061)"

This reverts commit 67937a3.

Revert "Fix build break for llvm#89884 (llvm#100050)"

This reverts commit c33878c.

Revert "[CGData] Fix -Wpessimizing-move in CodeGenDataReader.cpp (NFC)"

This reverts commit 1f8b2b1.

(cherry picked from commit 73d7897)

Author: gulfemsavrun