[cDAC] Implement ReplacePatchesInHostMemory in amd64 unwinder

[max-charlamb]

#111759 adds support for native unwinding in the cDAC, but does not re-implement ReplacePatchesInHostMemory as in the DAC build.

On x64, the DAC replaces patched breakpoints when the unwinder fetches the instruction stream. This is required for the unwinder logic to disassemble the native instructions and check if the IP is in a function epilog.

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