Add developer token as authentication method to GoogleAdsHook

[LeonGraveland]

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This PR is the result of #30954

It adds a extra method of authenticating with google ads using the GoogleAdsHook. It only requires one connection containing a persistent developer token with credentials. Docs on how to get a developer token can be found here

It is implemented in a way that it determines the way of authentication by the contents in the 'extra' field of the google ads connection.

[boring-cyborg]

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[boring-cyborg]

Awesome work, congrats on your first merged pull request! You are invited to check our Issue Tracker for additional contributions.