Adds a workaround for the SIGFPE in glibc 2.34+ __libc_early_init() by setting two ld.so globals located via hardcoded offsets, making this fragile and considered temporary.
Tested on glibc 2.34 where every libc-using client crashes with SIGFPE but they work with this fix.
Adds an Ubuntu22 GA CI run but if we have failures due to other reasons the plan is to drastically shrink the tests run or abandon if it's too much work right now.
Issue: #5437