Add rake task for openid_connect / CILogon cleanup

[aaronskiba]

Fixes #912

Changes proposed in this PR:

• Adds a task to rake dmp_assistant_upgrade:4_2_3
  • Updates .identifier_prefix from 'http://cilogon.org/serverE/users/' to '' for the openid_connect IdentifierScheme
  • Updates the prefixed value of .value from 'http://cilogon.org/serverE/users/' to '' for some existing openid_connect-related identifiers
    • Specifically, the following identifiers are updated:

      old_prefix = 'http://cilogon.org/serverE/users/'
      identifier_scheme = IdentifierScheme.find_by!(name: 'openid_connect')
      identifiers = identifier_scheme.identifiers.where('value ~* ?', "#{old_prefix}.+cilogon.+")

• NOTE: This PR is largely based off of the following PR: Clean/openid connect identifiers database #915

[github-actions]

	1 Warning
⚠️	There are code changes, but no corresponding tests. Please include tests if this PR introduces any modifications in behavior. \n Ignore this warning if the PR ONLY contains translation.io synced updates.

Generated by 🚫 Danger

[lagoan]

All looks good ! We just need an entry to the CHANGELOG

[aaronskiba]

All looks good ! We just need an entry to the CHANGELOG

Sounds good, thanks. I just added it. :)

[lagoan]