[llvm] [llvm][arm] add T1 and T2 assembly optoins for vlldm and vlstm (PR #83685)

[via llvm-commits]

sivan-shani wrote:

Windows failure is not related to this change
```
# error: command failed with exit status: 0xc0000005
# executed command: 'c:\ws\src\build\bin\filecheck.exe' 'C:\ws\src\flang\test\Fir\memory-allocation-opt.fir'
# .---command stderr------------
# | FileCheck error: '<stdin>' is empty.
```

https://github.com/llvm/llvm-project/pull/83685