17.0.6-ucrt64: use UCRT64 instead of MINGW64 in msys2

- links to ucrt C library like msvc does instead of legacy msvcrt C library

17.0.6

llvm -> 17.0.6, update artifact uploads

17.0.4

add write permissions

16.0.6

llvm -> 16.0.6

llvm -> 16.0.4

build system changes:

- linux toolchain: llvm 14 -> llvm 16
- msys toolchain: gcc12 -> gcc 13 (this changed in msys)

16.0.0

update cmake modules location to match hard-coded relative path in CM…

15.0.5

disable new ZSTD option, bump llvm -> 15.0.5

15.0.4

- LLVM -> 15.0.4

15.0.0

also download separately packaged build-time cmake modules

14.0.6: ubuntu 18.04 -> 20.04

- ubuntu 18.04 runners are being removed from GHA
- also remove unused msvc and mingw 32-bit builds