Refactor delete...() methods

[Tigrov]

• Remove redundant false return type in ActiveRecordInterface::delelte() method
• Refactor and move ActiveRecord::deleteInternal() to BaseActiveRecord::deleteInternal()
• Add optimistic lock tests on delete and after delete.

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌
Fixed issues	-

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (fb7f4a8) 87.79% compared to head (f3177f5) 88.63%.

Files	Patch %	Lines
src/BaseActiveRecord.php	84.61%	2 Missing ⚠️
src/ActiveRecord.php	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #284      +/-   ##
============================================
+ Coverage     87.79%   88.63%   +0.83%     
+ Complexity      580      575       -5     
============================================
  Files             7        7              
  Lines          1311     1302       -9     
============================================
+ Hits           1151     1154       +3     
+ Misses          160      148      -12     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[what-the-diff]

PR Summary

• Updates to ActiveRecord.php, ActiveRecordInterface.php, and BaseActiveRecord.php
  The existing delete() methods in these files were updated to always return an integer value. Previously, they could return either false (representing an unsuccessful delete) or an integer (representing the number of deleted records). Now, they only return an integer, which simplifies the tracking of delete operations and makes the code more consistent. Additionally, minor code cleanup was performed for efficiency and readability.

• Introduction of deleteInternal() in BaseActiveRecord.php
  A new method, deleteInternal(), was added to handle the actual deletion logic. This makes the code more straightforward and gathers the deletion operations into a single location.

• Additional test methods in ActiveQueryTest.php
  Two new test methods, testOptimisticLockOnDelete() and testOptimisticLockAfterDelete(), were added. These tests will ensure the code is working as expected when handling deletion operations. This contributes to improving overall code reliability and predictability.

• Minor correction in Cat.php
  There was a minor fix made to a division operation in the file. This update ensures the accuracy of the operation.

Please note that while some changes might come off as minor, they contribute significantly to the overall performance and reliability of the application.