…of `MockBuilder`

…nt access to /dev/tty.If open_basedir restrictions are in effect, checking if the file /dev/tty is writable will prevent setting tty mode on the process, and avoid failing to create a Process.

* 5.4:  [PropertyInfo] Update DoctrineExtractor for new DBAL 4 BIGINT type  Update security.nl.xlf  [Validator] IBAN Check digits should always between 2 and 98  [Security] Populate translations for trans-unit 20  add missing plural translation messages  filter out empty HTTP header parts  [String] Fix folded in compat mode  Remove calls to `getMockForAbstractClass()`  [ErrorHandler] Do not call xdebug_get_function_stack() with xdebug >= 3.0 when not in develop mode  [Serializer] Fix type for missing property  add test for JSON response with null as content  [Filesystem] Fix dumpFile `stat failed` error hitting custom handler  Remove calls to `TestCase::iniSet()` and calls to deprecated methods of `MockBuilder`  [PhpUnitBridge] Fix `DeprecationErrorHandler` with PhpUnit 10

* 6.4:  [Serializer] Improve exception message in UnwrappingDenormalizer  [PropertyInfo] Update DoctrineExtractor for new DBAL 4 BIGINT type  Update security.nl.xlf  [Validator] IBAN Check digits should always between 2 and 98  [Security] Populate translations for trans-unit 20  add missing plural translation messages  filter out empty HTTP header parts  [String] Fix folded in compat mode  Remove calls to `getMockForAbstractClass()`  [ErrorHandler] Do not call xdebug_get_function_stack() with xdebug >= 3.0 when not in develop mode  [Serializer] Fix type for missing property  add test for JSON response with null as content  [Filesystem] Fix dumpFile `stat failed` error hitting custom handler  Return false in isTtySupported() when open_basedir restrictions prevent access to /dev/tty.  Remove calls to `TestCase::iniSet()` and calls to deprecated methods of `MockBuilder`  [PhpUnitBridge] Fix `DeprecationErrorHandler` with PhpUnit 10

This reverts commit 2c9352dd91ebaf37b8a3e3c26fd8e1306df2fb73, reversingchanges made to 18c3e87f1512be2cc50e90235b144b13bc347258.

* 5.4:  Revert "minor #54653 Auto-close PRs on subtree-splits (nicolas-grekas)"

* 6.4:  Remove subtree split checks  Revert "minor #54653 Auto-close PRs on subtree-splits (nicolas-grekas)"