Update AdSense signup URL to point to

[felixarntz]

The AdSense "signup" URL that Site Kit points to should be updated to the URL with the newer AdSense frontend UI. Note that while the URL includes the term "signup", it can be used for users without any AdSense account as well as for users with an existing AdSense account where they just want to add a new site.

The AdSense frontend will handle this accordingly based on the current user and show the correct UI. For reference:

New UI:

Old UI:

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Acceptance criteria

• Instead of using https://www.google.com/adsense/signup/new for the AdSense "signup" URL, it should be updated to https://www.google.com/adsense/signup, which will result in a different UI being presented to the user.

Implementation Brief

• Update the AdSense signup URL as described in the ACs in the AdSense PHP class and the modules/adsense getServiceCreateAccountURL JS store selector.
• Merge Update AdSense signup URL to newer version. #4240.

Test Coverage

• N/A

QA Brief

• Use a Google account where you don't have any AdSense account. Make sure you're logged in in your browser with primarily that account (e.g. in an incognito window, separate from your regular accounts).
• Set up AdSense in Site Kit, you should land in the setup step where it says to create an account.
• When clicking the blue CTA button, you should land in an AdSense UI that looks like the one in the new screenshot on top of this issue description.

Changelog entry

• Update AdSense signup URL to point to the latest UI.

[felixarntz]

@eclarke1 @aaemnnosttv This is a short-term issue that came through as requirement from AdSense while further testing the AdSense platforms tag behavior (see #3688), as they've updated their signup UI. It's a super-simple one to include, so I've marked it with the 1.44.0 release.

It's only a 1, and I've created a PR, so this shouldn't really add anything to our load :)

[aaemnnosttv]

IB ✅

[eclarke1]

cc @fhollis to this one being added to the sprint but it has a PR so shouldn't add to the load

[wpdarren]

QA Update: ✅

• Set up AdSense in Site Kit, clicked the blue CTA button, and I am redirected to the new AdSense UI