Add New Login Flow Authenticator Categories related to Custom Authenticators

[Shenali-SJ]

Purpose

With this PR we are introducing new authenticator categorizations at the login flow editor.

Introduced categories

• External user authentication - includes custom federated authenticators
• Internal user authentication - includes custom local authenticators (except 2fa)
• 2FA authentication - includes custom local second factor authenticators

Related Issue

• Revamp Login Flow Authenticator Categorisations with Introduction of Custom Authenticators product-is#22939

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 41.85%. Comparing base (2366a28) to head (602ef75).
Report is 96 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7621   +/-   ##
=======================================
  Coverage   41.85%   41.85%           
=======================================
  Files          42       42           
  Lines         939      939           
  Branches      217      217           
=======================================
  Hits          393      393           
  Misses        546      546           

Flag	Coverage Δ
@wso2is/core	41.85% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.