Update scan execution policy summary for tags

What does this MR do and why?

Describe in detail what your merge request does and why.

Update scan execution policy summary for tags

• humanize tags along with scanners

Changelog: added

EE: true

Screenshots or screen recordings

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Before	After
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How to set up and validate locally

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

1. Upload a GitLab Ultimate license
2. Enable the echo "Feature.enable(:scan_execution_tags)" | rails c
3. Navigate to http://gdk.test:3443/groups/flightjs/-/security/policies/new?type=scan_execution_policy
4. Create a policy with tags, merge the resulting MR
5. Navigate to http://gdk.test:3443/groups/flightjs/-/security/policies and select the created policy and verify the drawer

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 #382994 (closed)