Drop -gdwarf-4 flag from the BOLT build.

Sidenote: BOLT now supports DWARF5, so there's no need to force `-gdwarf-4`

https://github.com/python/cpython/blob/main/configure.ac#L1950-1952

_Originally posted by @aaupov in https://github.com/python/cpython/issues/101093#issuecomment-1386296142_
            


### Linked PRs
* gh-101280