[llvm] [BOLT][RISCV] Handle static IFUNC calls through .iplt (PR #207733)

[via llvm-commits]

Thrrreeee wrote:

> Does AddressMap part is necessary for this patch? I feel that could be a separated PR and having a testcase to demonstrate what issue got fixed?

This is intended to support RV32. If we only consider RV64, this part can be removed for now and  be a separated PR.

https://github.com/llvm/llvm-project/pull/207733