Add utility method to get authenticator property values from properties array

[ThaminduDilshan]

Proposed changes in this pull request

Add a util method to get the authenticator property values start with a given identifier from a list of properties.

Related issue

• Implement a REST API for Resident IDP Inbound Authentication Configurations product-is#16911

Follow up actions

[List any possible follow-up actions here; for instance, testing data
migrations, software that we need to install on staging and production
environments.]

Checklist (for reviewing)

General

• Is this PR explained thoroughly? All code changes must be accounted for in the PR description.
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Functionality

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• Does the UI work as expected? There should be no Javascript errors in the console; all resources should load. There should be no unexpected errors. Deliberately try to break the feature to find out if there are corner cases that are not handled.

Code

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Tests

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Security

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Documentation

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• Are reusable components documented? If this PR introduces components that are relevant to other developers (for instance a mixin for a view or a generic form) they should be documented in the Wiki.

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/6470197362

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PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/6470197362
Status: success

[jenkins-is-staging]

Approving the pull request based on the successful pr build https://github.com/wso2/product-is/actions/runs/6470197362