libstdc++: Update value of __cpp_lib_ios_noreplace macro

My P2467R1 proposal was accepted for C++23 so there's an official value
for this macro now.

libstdc++-v3/ChangeLog:

	* include/bits/ios_base.h (__cpp_lib_ios_noreplace): Update
	value to 202207L.
	* include/std/version (__cpp_lib_ios_noreplace): Likewise.
	* testsuite/27_io/basic_ofstream/open/char/noreplace.cc: Check
	for new value.
	* testsuite/27_io/basic_ofstream/open/wchar_t/noreplace.cc:
	Likewise.