gcc plugin: Keep ELF notes at protocol version 3.

Protocol Version 4: String format notes.

Annocheck: Update message for LTO tests. (#2177140)
Annocheck: Add even more code to handle another glibc function built without LTO.
Annocheck: Add code to handle another glibc function built without LTO.

GCC Plugin: Do not run if other plugins are active. (#2162746)
Annocheck: Add code to handle glibc functions built without LTO.

Libannocheck: Fix thinko in debugging code.
Annocheck: Fix LTO test.
Notes: Display notes held in separate dbeuginfo files.

Annocheck: Fix atexit test. Fix recording of version numbers. (#2165528)

LLVM & Clang Plugins: Build with branch protection on AArch64. (#2164364)
Fix gating tests.

Libannocheck: Fix bug causing infinite looping when running tests.

Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild

Rebuilt against GCC 13.

Annocheck: Fix handling of file built by multiple versions of gcc. (#2160700)

Annocheck: Fix handling of empty files. (#2159292)

Annocheck: Add crti.o and crtn.o to the list of known glibc special files. (#2158740)

Annocheck: Fix memory leaks.

Annocheck: Do not assume that object files contain no code simply because they do not have an executable segment. (#2158182)

Annocheck: Add more special glibc filenames. (#2158100)