bindist: Clean xattrs of bin and lib at configure time

For issue #21506 (closed), we started cleaning the extended attributes of binaries and libraries from the bindist after they were installed to workaround notarisation (#17418), as part of make install.

However, the ghc-toolchain binary that is now shipped with the bindist must be run at ./configure time. Since we only cleaned the xattributes of the binaries and libs after they were installed, in some situations users would be unable to run ghc-toolchain from the bindist, failing at configure time (#24554 (closed)).

In this commit we move the xattr cleaning logic to the configure script.

Fixes #24554 (closed)