Python:Consolidate Bing and Google search into a single file

[N-E-W-T-O-N]

Motivation and Context

Description

Consolidate Bing & Google Seach into a Single file based on the discussion #11531 (comment)

Updated references in Test files as well .

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[eavanvalkenburg]

Thanks for taking the effort here @N-E-W-T-O-N , however we will remove the bing one soon so please undo those changes, and doing this for a released connector is a breaking change, so I will merge that part into a feature branch for a bunch of them, prob late this week or early next week.