[BOLT] Err when linking objects of different architectures (#66770)

This could happen, for example, when instrumenting an AArch64 binary on
an x86 host because the instrumentation library is always built for the
host.

Note that this check will probably need to be refined in the future as
merely having the same architecture does not guarantee objects can be
linked. For example, on RISC-V, the float ABI of all objects should
match.