Bump required WordPress to 6.6 and WooCommerce to 9.7

[ankitrox]

Changes proposed in this Pull Request:

Closes https://linear.app/a8c/issue/GOOWOO-189/bump-required-wordpress-to-66-and-woocommerce-to-97

Replace this with a good description of your changes & reasoning.

Screenshots:

Detailed test instructions:

1. Search the codebase to see if there are any WordPress and WooCommerce versions noted that have not been updated together.

2. Setup the site with older woocommerce version, which should show the notice as shown in above screenshot.

Additional details:

Changelog entry

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.1%. Comparing base (6017543) to head (4ec8ebb).

Additional details and impacted files

@@             Coverage Diff             @@
##             develop   #2998     +/-   ##
===========================================
- Coverage       66.2%   66.1%   -0.1%     
  Complexity      4820    4820             
===========================================
  Files            826     491    -335     
  Lines          25715   20506   -5209     
  Branches        1273       0   -1273     
===========================================
- Hits           17026   13563   -3463     
+ Misses          8536    6943   -1593     
+ Partials         153       0    -153     

Flag	Coverage Δ
js-unit-tests	?
php-unit-tests	66.1% <ø> (ø)

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Files with missing lines	Coverage Δ
google-listings-and-ads.php	75.0% <ø> (ø)

... and 335 files with indirect coverage changes

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