Add Username Recovery multichannel support configs

[Malith-19]

Proposed changes in this pull request

[List all changes you want to add here. If you fixed an issue, please
add a reference to that issue as well.]

• Add separate configs for the email and sms channel in username recovery.

Related issues

• SMS support for username recovery flow wso2/product-is#21180

Important notes

• We are not removing the previous username enable config which is used to disable the connector when both email and sms channels are disabled.
• To keep the backward compatibility we are using default value of the email channel as username enable value.

Related PRs

• Username recovery sms support wso2/carbon-identity-framework#6040
• Update the username recovery config page to support multiple channels. wso2/identity-apps#7004
• Username recovery sms support wso2/identity-apps#7005

[PasinduYeshan]

Is it possible to send recovery notifications simultaneously via both email and SMS channels?

[Malith-19]

admins can enable both channels but when we come to the flow user should select a one channel if both were enable and if only one channel available, then notification will be send to that channel directly.

[PasinduYeshan]

Update unit tests for this class.

[codecov]

Codecov Report

Attention: Patch coverage is 73.68421% with 5 lines in your changes missing coverage. Please review.

Project coverage is 36.46%. Comparing base (1929c98) to head (fd94896).
Report is 6 commits behind head on master.

Files with missing lines	Patch %	Lines
...dentity/recovery/connector/RecoveryConfigImpl.java	73.68%	3 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #865      +/-   ##
============================================
+ Coverage     36.04%   36.46%   +0.42%     
- Complexity     1450     1451       +1     
============================================
  Files           267      267              
  Lines         15788    15809      +21     
  Branches       2181     2184       +3     
============================================
+ Hits           5691     5765      +74     
+ Misses         9383     9327      -56     
- Partials        714      717       +3     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.