[lldb/DWARF] Use DW_AT_call_pc to determine artificial frame address
lldb currently guesses the address to use when creating an artificial
frame (i.e., a frame constructed by determining the sequence of (tail)
calls which must have happened).
Guessing the address creates problems -- use the actual address provided
by the DW_AT_call_pc attribute instead.
Depends on D76336.
Differential Revision: https://reviews.llvm.org/D76337