toolchain: gcc: add support for GCC 13

toolchain: gcc: add support for GCC 13

Release Notes:
https://gcc.gnu.org/pipermail/gcc-announce/2023/000175.html

Manually Refreshed:
- 910-mbsd_multi.patch
- 970-macos_arm64-building-fix.patch

Automatically Refreshed:
- 010-documentation.patch
- 230-musl_libssp.patch
- 300-mips_Os_cpu_rtx_cost_model.patch
- 820-libgcc_pic.patch
- 840-armv4_pass_fix-v4bx_to_ld.patch
- 850-use_shared_libgcc.patch
- 870-ppc_no_crtsavres.patch
- 920-specs_nonfatal_getenv.patch

Signed-off-by: Nick Hainke <vincent@systemli.org>