Add group level security policies new/edit pages

What does this MR do and why?

Describe in detail what your merge request does and why.

Add group level security policies new/edit pages

• add group policies edit route
• add group policies new route
• update tests

Hidden behind the :group_level_security_policies feature flag

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Page	Feature flag on	Feature flag off
new
edit

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MR acceptance checklist

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Related to #345317 (closed)