[Chapel Merge] Update LLVM information for GPUs

Branch: refs/heads/main
Revision: c19b2d86d609910b5b0f124c6674cb63beed7889
Author: jabraham17
Link: Update LLVM information for GPUs by jabraham17 · Pull Request #28831 · chapel-lang/chapel · GitHub
Log Message:
Update LLVM information for GPUs (#28831)

Updates the version of LLVM primarily tests to be LLVM 22, since the
bundled LLVM is now 22

[Not reviewed - trivial]

Compare: Comparing 6610cad14b61712b4cbca929535771322c917e57...fff322bdb4841398ecd4f60b98f7b40dd7dc7cb6 · chapel-lang/chapel · GitHub

Diff:
M doc/rst/technotes/gpu.rst
M test/gpu/native/llvmMoved.chpl
https://github.com/chapel-lang/chapel/pull/28831.diff