fix(refresher): correctly detect spinner when using native refresher

[liamdebeasi]

Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Build (npm run build) was run locally and any changes were pushed
• Lint (npm run lint) has passed locally and any fixes were made for failures

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: resolves #22706

What is the new behavior?

• Revert to old query. Though not really sure why doing ion-refresher-content .pulling-icon ion-spinner works but doing refresherContentRef.querySelector('.pulling-icon ion-spinner') does not.
• Also both refresher tests were using the native refresher which is why we did not catch this. Reverted the basic test to using the old refresher.

Does this introduce a breaking change?

• Yes
• No

Other information