Refactor to remove parseQueryStringIntoObject

What does this MR do?

Refactor to remove parseQueryStringIntoObject

This refactor removes parseQueryStringIntoObject in favor of using queryToObject from our URL utils.

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Does this MR meet the acceptance criteria?

Conformity

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Security

Does this MR contain changes to processing or storing of credentials or tokens, authorization and authentication methods or other items described in the security review guidelines? If not, then delete this Security section.

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• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
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Related to #328845 (closed)