PHP 8.2 strpos dep in mysql schema

[thomassb]

Q	A
Is bugfix?	✔️/
New feature?	/❌
Breaks BC?	/❌
Tests pass?	?
Fixed issues	n/a

[what-the-diff]

PR Summary

• Updated Criteria for Determining Primary Key in CMysqlSchema.php
  The system is now more accurate in identifying primary keys. It does so by examining Key content and verifying the presence of 'PRI'. This adjustment ensures accurate identification and handling of primary keys, enhancing database management and operation.

• Hoisted Precision for Auto-Increment Recognition in CMysqlSchema.php
  The system improves in recognizing auto-increment fields. It checks 'Extra' content for the 'auto_increment' stipulation. This update increases precision in handling fields meant for auto-increment, contributing to the smoother operation of data inflow in the database.