Improve email domain discovery page to incorporate new configuration for enabling email domain discovery for self-registration

[Yasasr1]

Purpose

Following improvements will be made to the existing email domain discovery page

• Generalize the page name to "Organization Discovery"
• Move down the assign email domain button from top right corner to separate email domain discovery related configs from email domain mappings for organizations
• Improve the info message at the top to mention the flows that restricts email domains when email domain discovery is enabled
• Add a checkbox to incorporate the new config: email domain based organization discovery for self-registration

Related issue

• https://github.com/wso2/product-is/issues/21610

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 32.02%. Comparing base (ef0a800) to head (ba5ced4). Report is 641 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #7084 +/- ## ========================================== + Coverage 31.79% 32.02% +0.22% ========================================== Files 41 41 Lines 890 893 +3 Branches 220 215 -5 ========================================== + Hits 283 286 +3 Misses 557 557 Partials 50 50 ``` | [Flag](https://app.codecov.io/gh/wso2/identity-apps/pull/7084/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wso2) | Coverage Δ | | |---|---|---| | [@wso2is/core](https://app.codecov.io/gh/wso2/identity-apps/pull/7084/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wso2) | `32.02% <ø> (+0.22%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wso2#carryforward-flags-in-the-pull-request-comment) to find out more. [see 1 file with indirect coverage changes](https://app.codecov.io/gh/wso2/identity-apps/pull/7084/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wso2)

[wso2-jenkins-bot]

🦋 Changeset detected

The changes in this PR will be included in the next version bump.

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