Add support for OpenLDAP and 389ds PBKDF2 passwords

[olvrlrnz]

This commit enables the PAP module to recognize and handle OpenLDAP and 389ds style PBKDF2 passwords.
A new password type was added that leaves the password header intact when passing it to the authentication module, because it contains the hash function used. Currently, password_process_header strips that out, as none of the other supported hash formats need it.

[alandekok]

This seems bad :(

Fri Jun  7 13:40:36 2024: Debug : (0)        pap - Comparing with "known good" Password.PBKDF2-389DS = 0x7b50424b4446322d5348413531327d3130303030246b58375a467a6e796c69486f425a2b375a494941493179482b5639795a67366a246b797a7a343333432f706476646b7a50546a77693877723663484e5446443064434b75556b4b564d6d5367696c474244516a4e78664451775a7a46426950674368514a5446416d386f54686d363578724c47466e41673d3d (142)
Fri Jun  7 13:40:36 2024: Debug : (0)        pap - Comparing with "known-good" Password.PBKDF2
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==71020==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61100037b52e at pc 0x7fb507e396d5 bp 0x7fff88ce9df0 sp 0x7fff88ce9de8
READ of size 1 at 0x61100037b52e thread T0
    #0 0x7fb507e396d4 in strlcpy /home/runner/work/freeradius-server/freeradius-server/src/lib/util/strlcpy.c:52:10
    #1 0x7fb5007b891b in pap_auth_pbkdf2_parse /home/runner/work/freeradius-server/freeradius-server/src/modules/rlm_pap/rlm_pap.c:576:3
    #2 0x7fb5007b7cba in pap_auth_pbkdf2_389ds /home/runner/work/freeradius-server/freeradius-server/src/modules/rlm_pap/rlm_pap.c:724:10
    #3 0x7fb5007a8fdf in mod_authenticate /home/runner/work/freeradius-server/freeradius-server/src/modules/rlm_pap/rlm_pap.c:1007:2