[llvm] IPRA:Fix crash and verification failures for PLT calls (PR #196917)

[Quentin Colombet via llvm-commits]

https://github.com/qcolombet commented:

> However, for PLT calls, the register usage in the PLT stubs and the resolver function is not accounted for.
@vigbalu is it something that we know at compile time? If yes I think this is where we should use `getIntraCallClobberedRegs`.

https://github.com/llvm/llvm-project/pull/196917