Streamline onboarding, post-onboarding and campaign setup

[eason9487]

Changes proposed in this Pull Request:

This PR gathers all changes from the following feature PRs for final testing and to be merged together into develop.

• Feature: Streamline the onboarding flow #2631
• Feature: Streamline the campaign setup #2632
• Feature: Consolidate Google accounts setup during onboarding #2634
• Feature: Improve post-onboarding #2635

📌 Checklist before merging

• Revert 08cec68
• Revert e80472a
• Update tracking doc

[codecov]

Codecov Report

Attention: Patch coverage is 55.30547% with 139 lines in your changes missing coverage. Please review.

Project coverage is 65.0%. Comparing base (5d03086) to head (f252968).

Files with missing lines	Patch %	Lines
...c/components/paid-ads/ads-campaign/ads-campaign.js	0.0%	18 Missing and 3 partials ⚠️
...src/components/paid-ads/asset-group/asset-group.js	0.0%	13 Missing and 1 partial ⚠️
js/src/data/resolvers.js	22.2%	12 Missing and 2 partials ⚠️
js/src/hooks/useGoogleMCAccount.js	11.1%	6 Missing and 2 partials ⚠️
js/src/pages/create-paid-ads-campaign/index.js	0.0%	6 Missing and 1 partial ⚠️
js/src/pages/edit-paid-ads-campaign/index.js	0.0%	6 Missing and 1 partial ⚠️
js/src/utils/getHighestBudget.js	0.0%	5 Missing and 2 partials ⚠️
js/src/components/paid-ads/budget-section/index.js	16.7%	5 Missing ⚠️
...c/dashboard/summary-section/paid-features/index.js	16.7%	5 Missing ⚠️
js/src/setup-ads/ads-stepper/index.js	70.6%	5 Missing ⚠️
... and 24 more

Additional details and impacted files

@@             Coverage Diff             @@
##             develop   #2682     +/-   ##
===========================================
+ Coverage       64.7%   65.0%   +0.4%     
+ Complexity      4665    4656      -9     
===========================================
  Files            799     812     +13     
  Lines          24640   24572     -68     
  Branches        1242    1253     +11     
===========================================
+ Hits           15938   15983     +45     
+ Misses          8529    8417    -112     
+ Partials         173     172      -1     

Flag	Coverage Δ
js-unit-tests	62.3% <54.5%> (-0.1%)	⬇️
php-unit-tests	65.8% <75.0%> (+0.5%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...nts/free-ad-credit/country-modal/country-amount.js	100.0% <ø> (ø)
...c/components/free-ad-credit/country-modal/index.js	16.7% <ø> (ø)
js/src/components/free-ad-credit/index.js	11.1% <ø> (ø)
...choose-audience-section/choose-audience-section.js	33.3% <ø> (+8.3%)	⬆️
...listings/configure-product-listings/checkErrors.js	100.0% <100.0%> (ø)
...gle-ads-account-card/connect-ads/connect-button.js	100.0% <100.0%> (ø)
...nents/google-ads-account-card/connect-ads/index.js	95.8% <100.0%> (-0.2%)	⬇️
.../components/google-combo-account-card/constants.js	100.0% <100.0%> (ø)
...components/merchant-center-select-control/index.js	100.0% <100.0%> (ø)
...rc/components/paid-ads/add-paid-campaign-button.js	73.3% <100.0%> (ø)
... and 56 more

... and 16 files with indirect coverage changes

---- 🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests
• JS Bundle Analysis - Avoid shipping oversized bundles

[eason9487]

During overall testing, found an issue that it may try to connect to an unclaimed and disconnected account ID. Created PR #2688 to fix it.