[llvm] [llvm][arm] add T1 and T2 assembly options for vlldm and vlstm (PR #83116)

[Rodolfo Wottrich via llvm-commits]

rgwott wrote:

Looks like CI is breaking two test cases:
`Failed Tests (2):
  LLVM :: CodeGen/ARM/cmse-vlldm-no-reorder.mir
  LLVM :: CodeGen/ARM/vlldm-vlstm-uops.mir`

https://github.com/llvm/llvm-project/pull/83116