[llvm] RuntimeLibcalls: Move __stack_chk_fail config to tablegen (PR #148789)

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

This broke compiling for arm64ec mingw (https://github.com/mstorsjo/llvm-mingw/actions/runs/16738033027/job/47380762274):
```c
void other(void *ptr);
void func(void) {
    char buf[10];
    other(buf);
}
```
```console
$ clang -target arm64ec-windows-gnu -c stacksmash-repro.c -fstack-protector-strong
fatal error: error in backend: unsupported library call operation
```

CC @cjacek @efriedma-quic 

https://github.com/llvm/llvm-project/pull/148789