Missing arm64 tools blocking bootstrap

Trying to bootstrap on an Ubuntu 22.04 Arm64 machine, the [script](https://github.com/dotnet/jitutils/blob/2ee1e8ac13f646376effa1522c92881a468e89bb/bootstrap.sh#L77-L90) is unable to obtain builds from https://clrjit.blob.core.windows.net/

```
jit-decisions-analyze -> /home/runtime-utils/Runner/jitutils/src/jit-decisions-analyze/bin/Release/net6.0/ubuntu.22.04-arm64/jit-decisions-analyze.dll
jit-decisions-analyze -> /home/runtime-utils/Runner/jitutils/bin/
/usr/bin/curl
Downloading clang-format to bin directory
#=#=#
##O#-#
##O=# #
curl: (22) The requested URL returned error: 404

chmod: cannot access 'bin/clang-format': No such file or directory
Downloading clang-tidy to bin directory
#=#=#
##O#-#
##O=# #
curl: (22) The requested URL returned error: 404

chmod: cannot access 'bin/clang-tidy': No such file or directory
Either clang-tidy or clang-format was not installed. Please install and put them on the PATH to use jit-format.
Tools can be found at http://llvm.org/releases/download.html#3.8.0
ERROR: Failed to download clang-format and clang-tidy.
```

Manually [downloading them](https://github.com/MihaZupan/runtime-utils/tree/clang-tools) to `bin/clang-format` and `bin/clang-tidy` seems to work okay.