[FancyZones] Tests: FZEditor

[SeraphimaZykova]

Summary of the Pull Request

Tests added:

• Add test data and start → verify data is correct (custom layouts, template layouts, defaults, shortcut keys)
• Create a new canvas - verify layout exists
• Create a new canvas - cancel - doesn’t exist
• Create a new grid - verify the layout exists
• Create a new grid - cancel - doesn’t exist
• Duplicate template by button (+ check default)
• Duplicate template by menu (+ check default)
• Duplicate custom by button (+ check shortcut key and default)
• Duplicate custom by menu (+ check shortcut key and default)
• Delete non-applied layout
• Delete applied layout
• Delete-cancel
• Delete from context menu
• Delete: hotkey released
• Delete: default layout reset to default-default
• Edit template and save
• Edit template and cancel
• Edit custom and save
• Edit custom and cancel
• Edit canvas: add zone
• Edit canvas: delete zone
• Edit canvas: move zone
• Edit canvas: resize zone
• Edit grid: split zone
• Edit grid: merge zones
• Edit grid: move splitter
• UI Init: assigned layouts selected
• UI Init: applied default - check params
• UI Init: assigned custom layout, but id not found
• Assign the same template but with different params to monitors
• Assign layout on each monitor
• Assign custom
• Assign template
• Assign shortcut key and save
• Assign shortcut key and cancel
• Reset shortcut key and save
• Reset shortcut key and cancel
• Set default layout + verify both prev and current after reopening
• applied-layouts.json keeps info about not connected devices - verify they’re present after closing
• applied-layouts.json keeps info about other virtual desktops
• first launch without custom-layouts.json, default-layouts.json, layout-hotkeys.json and layout-templates.json

PR Checklist

• Closes: [FancyZones] Tests: FZEditor  #29239
• Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• Tests: Added/updated and all pass
• Localization: All end user facing strings can be localized
• Dev docs: Added/updated
• New binaries: Added on the required places
  • JSON for signing for new binaries
  • WXS for installer for new binaries and localization folder
  • YML for CI pipeline for new test projects
  • YML for signed pipeline
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Validation Steps Performed

[Jay-o-Way]

Hi. Is this PR ready?