Solidify OIDC, LDAP

[JesseCoretta]

[JesseCoretta]

OIDC partially implemented, requires further testing. LDAP is largely untouched

[JesseCoretta]

An OpenLDAP docker image has been implemented in Actions. LDAP-specific Go tests expect to find Docker environment variables for LDAP. If found, the tests are run. If absent (e.g.: ztp is being tested on a normal computer without an LDAP system) the tests are SKIPPED.

LDAP is NOT for authentication, but rather for enriching identities with directory-derived content (e.g.: displayName, et al).