[BOLT][NFC] Pass Function to BC.printInstructions in BinaryBasicBlock::dump

BC::printInstruction(s) has many uses of Function ptr if it's available:
# printing CFI instructions (unconditional)
# printing debug line information (-print-debug-info)
# printing instruction relocations (-print-relocations)

Enable these uses by passing Function ptr from the primary printing entry point:
BinaryBasicBlock::dump.

Reviewed By: maksfb

Differential Revision: https://reviews.llvm.org/D126916