sources/ldap: fix mapping check, fix debug endpoint (#11442)
* run connectivity check always
* don't run sync if either sync_ option is enabled and no mappings are set
* misc label fix
* misc writing changse
* add api validation
* fix debug endpoint
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Signed-off-by: Jens Langhammer <jens@goauthentik.io>
Co-authored-by: Jens L. <jens@goauthentik.io>