"Error in GnuTLS initialization: Error while performing self checks" in FIPS mode

Description of problem: When using GnuTLS in FIPS mode, it fails its self check suite upon bootup.

Version-Release number of selected component (if applicable):
3.6.16-6.el8_7.x86_64

How reproducible: Consistent.

Steps to Reproduce:
1. Enable FIPS mode on a system.
2. Reboot the system.

Actual results:
A message appepars in the journald log from dracut-cmdline: "Error in GnuTLS initialization: Error while performing self checks."

Expected results:
GnuTLS passes self-checks for FIPS.

Additional info:
This appears to be a regression from Bugzilla 1665061, which was fixed in gnutls-3.6.5-2.el8.