[ldap] Stop using entities table in ldap source authentication and parser We may used cwuri for the same purpose, and do one more step towards deletion of entities.extid column. Related to #15538288

Release notes
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.. toctree::
    :maxdepth: 1

    3.23
    3.22
    3.21
    3.20
    3.19
    3.18
    3.17
    3.16
    3.15
    3.14