Change connection test page capabilities to manage_woocommerce

[jorgemd24]

Changes proposed in this Pull Request:

Part of #2146

Currently, the connection test page is only available to the administrator because it is registered with the manage_options capability. However, all our endpoints are checking the manage_woocommerce capability.

google-listings-and-ads/src/API/PermissionsTrait.php

Lines 20 to 22 in cbcff08

	protected function can_manage(): bool {
	return current_user_can( 'manage_woocommerce' );
	}

This makes it harder for a Shop Manager to debug any issues with the new approach as the connection test page is not available. Therefore, this PR updates the capability to manage_woocommerce. Since all actions available on the connection test page are also accessible through the UI for users with manage_woocommerce capability I don't think we are giving new privileges to the Shop Manager role.

Screenshots:

Detailed test instructions:

1. Log in to wp-admin with a Shop Manager user role.
2. Add this filter add_filter('woocommerce_gla_enable_connection_test','__return_true'); or navigate to wp-admin/admin.php?page=connection-test-admin-page
3. Check that you can access the Connection Test Page.

Additional details:

Not sure why but the phpcs were failing for the account services test, so I fixed it in this PR.

Changelog entry

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 64.5%. Comparing base (aec6d57) to head (e048937).
Report is 477 commits behind head on feature/google-api-project.

Additional details and impacted files

@@                      Coverage Diff                       @@
##             feature/google-api-project   #2443     +/-   ##
==============================================================
+ Coverage                          64.2%   64.5%   +0.3%     
- Complexity                         4484    4541     +57     
==============================================================
  Files                               471     472      +1     
  Lines                             18862   17707   -1155     
==============================================================
- Hits                              12117   11425    -692     
+ Misses                             6745    6282    -463     

Flag	Coverage Δ
php-unit-tests	64.5% <0.0%> (+0.3%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
src/ConnectionTest.php	0.0% <0.0%> (ø)

... and 202 files with indirect coverage changes

[ianlin]

Thanks for the change. I can confirm that the connection page is accessible when using the shop manager account.