Merge branch 'PHP-8.0' into PHP-8.1

* PHP-8.0:
Fixed bug #81494

Fixed bug #81494

Use the proper error reporting mechanism rather than throwing a
warning. This requires something of a hack because we don't have
direct access to the connection obje

Fixed bug #81494

Use the proper error reporting mechanism rather than throwing a
warning. This requires something of a hack because we don't have
direct access to the connection object at this point.

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Port skipif.inc files to EXTENSIONS

Mark slow tests

Each of these tests took more than ten seconds on a recent AppVeyor CI
run; that appears to qualify them to be marked as slow tests.

Closes GH-7077.

Fix bug #79375

Make sure deadlock errors are properly propagated and reports in
a number of places in mysqli and PDO MySQL.

This also fixes a memory and a segfault that can occu

Fix bug #79375

Make sure deadlock errors are properly propagated and reports in
a number of places in mysqli and PDO MySQL.

This also fixes a memory and a segfault that can occur under these
conditions.

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