Rename "orgDiscovery" Param to "login_hint"

[dhaura]

Purpose

• Rename orgDiscovery param to login_hint in order to utilize a standard dialect.

Related Issues

• Support "login_hint" and "orgDiscoveryType" Parameters for Organization Discovery product-is#20953

Related PRs

• Add Support for "login_hint" for Param in Organization Discovery wso2-extensions/identity-auth-organization-login#45
• Update Invalid Org Discovery Type Error to be Consistent with i18n Keys wso2-extensions/identity-auth-organization-login#46
• Add Invalid Org Discovery Type Error Message #6805

Checklist

• e2e cypress tests locally verified. (for internal contributers)
• Manual test round performed and verified.
• UX/UI review done on the final implementation.
• Documentation provided. (Add links if there are any)
• Relevant backend changes deployed and verified
• Unit tests provided. (Add links if there are any)
• Integration tests provided. (Add links if there are any)

Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines
• Ran FindSecurityBugs plugin and verified report
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets

[wso2-jenkins-bot]

🦋 Changeset detected

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 31.79%. Comparing base (825f099) to head (1789e68).
Report is 96 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6912   +/-   ##
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  Coverage   31.79%   31.79%           
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  Files          41       41           
  Lines         890      890           
  Branches      204      206    +2     
=======================================
  Hits          283      283           
+ Misses        607      587   -20     
- Partials        0       20   +20     

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