Fix/GOOWOO-526: Channel visibility event name change

[AlejandroPerezMartin]

Changes proposed in this Pull Request:

Closes https://linear.app/a8c/issue/GOOWOO-526/get-started-event-through-create-campaign-click-after-clicking-dismiss

Replaces the gla_google_ads_promo_create_campaign_click event in the Get started button within the channel visibility box with the event gla_google_ads_promo_get_started_click

Screenshots:

Detailed test instructions:

1. Clicking the "Get started" button in the channel visibility box should send the wcadmin_gla_google_ads_promo_get_started_click event

Additional details:

Changelog entry

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.2%. Comparing base (1ea106d) to head (e16dd18).
⚠️ Report is 2 commits behind head on feature/in-product-placements.

Additional details and impacted files

@@                       Coverage Diff                       @@
##             feature/in-product-placements   #3312   +/-   ##
===============================================================
  Coverage                             66.2%   66.2%           
  Complexity                            5429    5429           
===============================================================
  Files                                  909     909           
  Lines                                28060   28060           
  Branches                              1660    1660           
===============================================================
  Hits                                 18573   18573           
  Misses                                9246    9246           
  Partials                               241     241           

Flag	Coverage Δ
js-unit-tests	64.2% <ø> (ø)
php-unit-tests	66.8% <ø> (ø)

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[ankitguptaindia]

QA Status: Approved ✅