Add select all option for scan execution policy tags dropdown

What does this MR do and why?

This MR resolves #413271 (closed)

Now Listbox allows select all in header

This MR adds select all option runner tags selection

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

PROJECT	GROUP	ON DEMAND SCANS
project_select_all	group_select_all	on_demand_scans

How to set up and validate locally

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

1. Go to project or group

2. Secure -> Policies -> 'New policy' -> Scan result policy

3. Select Security scan in Rules section

4. Go to Secure->On demand scans` -> 'New'

5. Also enable on_demand_scans_runner_tags feature flag

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 #413271 (closed)