Add config to disable add/delete actions for remote userstores

[DonOmalVindula]

Purpose

$subject

Related Issues

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Related PRs

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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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