tap-adwords vs tap-googleads

As discussed in !221 (comment 877280723) we now have an "optimized" tap-adwords thats using a deprecated API and a new tap-googleads thats using the new API and is built on the SDK.

In MeltanHub we have 2 entries now called "Google Ads". The options I suggested were either:

  1. rename the original tap-adwords to "Google Adwords" as thats more descriptive since its not using the Ads API
  2. move the new tap-googleads to the optimized Meltano supported version and make tap-adwords the non-default variant

The second option requires more work to propagate that name change back to the discovery.yml and update the https://hub.meltano.com/extractors/adwords page with new markdown describing the detailed tap-googleads instructions.

@tayloramurphy @aaronsteers @DanielPDWalker