Bug fixes and Improvements for Identity verification providers feature

[JayaShakthi97]

Describe the issue: The identity verification providers feature is disabled in IS 7.0 vanilla pack. It can be enabled via following TOML configuration.

[console.identity_verification_providers]
enabled = true

Once the feature is enabled, the following issues were noticed;

• [BE] Even after enabling the configuration for IDVP, the page is not displayed in the console. This issue arises because the tokens do not return IDVP-related scopes, even for administrators who have already been granted permission.
• [FE] After setting up OnFido in IS, when trying to configure it in the console, the identity verification provider's name does not appear when typed.

Following UX gaps were identified specific to the OnFido connector;

• Make the Webhook Token field optional at the OnFido setup. Webhook token can not be obtained from OnFido dashboard before creating the IdVP.
• Provide a place to obtain the URL to generate the webhook token.

How to reproduce:

• Refer to the description.

Environment information (Please complete the following information; remove any unnecessary fields) :

• Product Version: IS 7.0.0
• OS: [e.g., Windows, Linux, Mac]
• Database: [e.g., MySQL, H2]
• Userstore: [e.g., LDAP, JDBC]

[JayaShakthi97]

Improvement-related PRs

• UI: https://github.com/wso2/identity-apps/pull/6949
• Framework: Enable IdVP feature - https://github.com/wso2/carbon-identity-framework/pull/5994
• Framework: Add feature scopes - https://github.com/wso2/carbon-identity-framework/pull/5989