[Feature]: extend transpiler support to attention

[ftynse]

• DS memory operations, direct and transposed ds_load_b32/b64/b12, _tr8/16 @martin-luecke [Comgr][hotswap] Raise direct LDS loads #4420 and [Comgr][transpiler] Raise transposed LDS loads #4450
• MUBUF operations (buffer_load/store) with tests for OOB handling, SRD decode @martin-luecke
• wide SMEM (b256, b512) - [Comgr][hotswap] Raise the wider scalar memory loads #4306
• SetPC analysis and PC-relative SMEM loads - @ftynse
• WMMA/MFMA remapping (this may benefit from an asm-to-asm test or perhaps an integration test) - @tgymnich
• cross-lane VALU (v_readfirstlane and friends) - @tgymnich
• MSB support (s_set_vgpr_msb) - @tgymnich - [Comgr][hotswap] Raise s_set_vgpr_msb #4383
• VOP3 packed ops (v_pl_add/mul) - @tgymnich - [Comgr][transpiler] Raise packed VOP3P add and multiply #4362
• VALU math ops (v_exp/rcp/cvt/cndmask and perhaps more) - @tgymnich - AMDGPU: Port hotswap VALU math operations #4359
• [Comgr] Fix transpiler shared-LLVM link failure and stale VGPR-bank test #4506