Add edit path to policies graphql API

What does this MR do and why?

Add edit path to policies graphql API

• remove creation of path in the frontend
• use edit path created in Add edit path to policies graphql API (!130366 - merged)
• update frontend tests

Changelog: changed

EE: true

Screenshots or screen recordings

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Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Navigate to a project/group => Security => Policies => New policy
2. Create a policy
3. Navigate to the project/group => Security => Policies => Select the new policy => Edit policy
4. Verify the user is navigated to the policy editor
5. Verify this works for escaped policies
6. Navigate to the project/group => settings => merge requests => select the new policy => View details => Edit policy
7. Verify the user is navigated to the policy editor
8. Verify this works for escaped policies

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #421339 (closed)