Submission Review Guidelines:

• I have followed the WooCommerce Contributing Guidelines and the WordPress Coding Standards.
• I have checked to ensure there aren't other open Pull Requests for the same update/change.
• I have reviewed my code for security best practices.
• Following the above guidelines will result in quick merges and clear and detailed feedback when appropriate.

Changes proposed in this Pull Request:

Some users are experiencing their sites log file being spammed with warnings from the PTK log warnings. This PR introduces a change which sets a transient to track that the warning log only happens once per day.

https://wordpress.org/support/topic/ptk-pattern-store/page/4/

How to test the changes in this Pull Request:

Using the WooCommerce Testing Instructions Guide, include your detailed testing instructions:

1. Enable tracking in your WooCommerce settings (/wp-admin/admin.php?page=wc-settings&tab=advanced&section=woocommerce_com)
2. Delete transient ptk_patterns transient. You can do so via the Transient Manager plugin.
3. Load your homepage
4. Check that the log is not present in your log file
5. Force your log to happen by setting $patterns = array() OR by deleting the transient wc_ptk_pattern_store_warning and canceling the scheduled action fetch_patterns
6. Load your homepage multiple times. Ensure that the transient wc_ptk_pattern_store_warning exists and that only 1 warning is in your log file

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