Remove the pickOne mode from TagsView

[crazytonyli]

Description

I originally planned to use the pickOne mode for adding tags as menu items. But after trying that, it did not work out. Because the menu item editing (MenuItemSourceResultsViewController specifically) is coupled with UITableView and UISearchBar - they need to be used by the tags selection view. We can't do that, because TagsView is implemented in SwiftUI.

[dangermattic]

	2 Warnings
⚠️	Translation files *.lproj/Localizable.strings should only be updated on a release branch.
⚠️	This PR is larger than 500 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

	1 Message
📖	This PR is still a Draft: some checks will be skipped.

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	App Name	WordPress
	Configuration	Release-Alpha
	Build Number	28220
	Version	PR #24676
	Bundle ID	org.wordpress.alpha
	Commit	2a5e93e
	Installation URL	7erpr0s9s3reo

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	App Name	Jetpack
	Configuration	Release-Alpha
	Build Number	28220
	Version	PR #24676
	Bundle ID	com.jetpack.alpha
	Commit	2a5e93e
	Installation URL	7jv3csd7booao

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[sonarqubecloud]

Quality Gate passed

Issues
13 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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