Add copy clean link to the macOS application menu bar

[fmarier]

The new "copy clean link" option is available in the contextual menu on macOS:

but it should also be available in the application menu bar where the keyboard shortcut can be seen:

(The keyboard shortcut is being changed to clean URLs by default in #26761.)

[stephendonner]

Verification PASSED using

Brave	1.49.96 Chromium: 110.0.5481.77 (Official Build) beta (x86_64)
Revision	65ed616c6e8ee3fe0ad64fe83796c020644d42af-refs/branch-heads/5481@{#839}
OS	macOS Version 11.7.3 (Build 20G1116)

Case 1: URL selection

Steps:

1. installed 1.49.96
2. launched Brave
3. loaded https://twitter.com/fmarier/status/1574869891978784769?s=21&t=lkfjeslkfjes&fbclid=1234
4. selected the URL
5. clicked on the top-level macOS Edit application-menu item
6. examined the shortcut options

Confirmed I got Copy Clean Link ⌘C

Case 2: substring selection

(continued from Case 1)

• selected substring fmarier/status/1574869891978784769
• clicked on the top-level macOS Edit application-menu item
• examined the shortcut options

Confirmed regular Copy ⌘C menu item

Case 3: no selection

• with no selection, clicked on the top-level macOS Edit application-menu item
• examined the shortcut options

Confirmed regular Copy ⌘C menu item