test: happy path playwright query tests

[tracy-french]

What this PR does / why we need it: This change includes happy path playwright query tests for all seven queries exposed by the query editor. The work includes:

• Happy path test cases for each query using mocked data and making assertions on the rendering of expected form elements.
• Addition of QueryEditor page object model test utility used to reduce duplication within tests and make it easier to write and maintain tests.
• Addition of queryEditor test fixture to remove the need to instantiate the QueryEditor object model explicitly in every test.
• Addition of missing ARIA labels in query editor components used for testing selectors.

Next steps:

• Tests utilizing all of the available form fields (e.g., resolution, aggregation, time, format, etc.).
• Tests for failure cases.
• Improved request interception code (there is current significant duplication and code size).

[tracy-french]

@sarahzinger Thank you for reviewing! :)