[llvm] [llvm][AArch64] Copy all operands when expanding BLR_BTI bundle (PR #78267)

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

> @mstorsjo I tested this using the ffmpeg commands you gave on the issue, but please run it through others if you have them.

Thanks! If it passes `make fate-checkasm` it should cover all the cases I had at hand - I'll try it out in my setup as well.

https://github.com/llvm/llvm-project/pull/78267