[UI Tests] Add complete OCR UI test coverage (#41947)

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fix/what does it change/how was it tested (even manually, if necessary)?
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## Summary of the Pull Request
* Enable Text Extractor. Then:
   - [x] Press the activation shortcut and verify the overlay appears.
   - [x] Press Escape and verify the overlay disappears.
   - [x] Press the activation shortcut and verify the overlay appears.
   - [x] Right-click and select Cancel. Verify the overlay disappears.
- [x] Disable Text Extractor and verify that the activation shortuct no
longer activates the utility.
 * With Text Extractor enabled and activated:
   - [x] Try to select text and verify it is copied to the clipboard.
- [x] Try to select a different OCR language by right-clicking and
verify the change is applied.
 * Test the different settings and verify they are applied:
   - [x] Activation shortcut
   - [x] OCR Language
 
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## PR Checklist

- [ ] Closes: #xxx
- [ ] **Communication:** I've discussed this with core contributors
already. If the 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](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

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wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed

src/settings-ui/Settings.UI/SettingsXAML/Views/PowerOcrPage.xaml

@@ -29,7 +29,10 @@
                         Name="TextExtractorEnableToggleControlHeaderText"
                         x:Uid="TextExtractor_EnableToggleControl_HeaderText"
                         HeaderIcon="{ui:BitmapIcon Source=/Assets/Settings/Icons/TextExtractor.png}">
-                        <ToggleSwitch x:Uid="ToggleSwitch" IsOn="{x:Bind ViewModel.IsEnabled, Mode=TwoWay}" />
+                        <ToggleSwitch
+                            x:Uid="ToggleSwitch"
+                            AutomationProperties.AutomationId="EnableTextExtractorToggleSwitch"
+                            IsOn="{x:Bind ViewModel.IsEnabled, Mode=TwoWay}" />
                     </tkcontrols:SettingsCard>
                 </controls:GPOInfoControl>
                 <InfoBar
@@ -48,12 +51,16 @@
                         Name="ActivationShortcut"
                         x:Uid="Activation_Shortcut"
                         HeaderIcon="{ui:FontIcon Glyph=&#xEDA7;}">
-                        <controls:ShortcutControl MinWidth="{StaticResource SettingActionControlMinWidth}" HotkeySettings="{x:Bind Path=ViewModel.ActivationShortcut, Mode=TwoWay}" />
+                        <controls:ShortcutControl
+                            MinWidth="{StaticResource SettingActionControlMinWidth}"
+                            AutomationProperties.AutomationId="TextExtractorActivationShortcut"
+                            HotkeySettings="{x:Bind Path=ViewModel.ActivationShortcut, Mode=TwoWay}" />
                     </tkcontrols:SettingsCard>
                     <tkcontrols:SettingsCard Name="TextExtractorLanguages" x:Uid="TextExtractor_Languages">
                         <ComboBox
                             x:Name="TextExtractor_ComboBox"
                             MinWidth="{StaticResource SettingActionControlMinWidth}"
+                            AutomationProperties.AutomationId="TextExtractorLanguageComboBox"
                             DropDownOpened="TextExtractor_ComboBox_DropDownOpened"
                             ItemsSource="{x:Bind Path=ViewModel.AvailableLanguages, Mode=OneWay}"
                             Loaded="TextExtractor_ComboBox_Loaded"