[SSSD] [sssd PR#5546][comment] kcm: add GET_CRED_LIST for faster iteration

[pbrezina]

URL: https://github.com/SSSD/sssd/pull/5546
Title: #5546: kcm: add GET_CRED_LIST for faster iteration

pbrezina commented:
"""
Note that you need to build krb5 from upstream to test it: https://github.com/krb5/krb5/pull/1165 (already merged)
"""

See the full comment at https://github.com/SSSD/sssd/pull/5546#issuecomment-803937302