Revert "Compile link-time thunks in codegen."

Reason for revert: This caused clang linker crash
in several branches.

Bug: 77581732

This reverts commit c9dd2207dfdab42586b1d6a5e7f11cf2fcea3a7a.

Change-Id: I1923809083cf41c4f19e3e60df03ae80517aaedb
31 files changed