PHPStan 2.x is available

[westonruter]

Feature Description

PHPStan 2.x is currently available. However, it is blocked by the built-in AMP plugin extensions to PHPStan:

amp-wp/phpstan.neon.dist

Lines 5 to 13 in e9b7e61

	services:
	-
	class: AmpProject\AmpWP\Tests\PhpStan\ServiceContainerDynamicReturnTypeExtension
	tags:
	- phpstan.broker.dynamicMethodReturnTypeExtension
	-
	class: AmpProject\AmpWP\Tests\PhpStan\ServicesDynamicReturnTypeExtension
	tags:
	- phpstan.broker.dynamicStaticMethodReturnTypeExtension

As well as to this unrecognized config:

amp-wp/phpstan.neon.dist

Lines 38 to 39 in e9b7e61

	featureToggles:
	requireFileExists: false

We'll need to follow the upgrading instructions in particular to address the former.

Acceptance Criteria

No response

Implementation Brief

No response

QA Testing Instructions

No response

Demo

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Changelog Entry

No response

[westonruter]

For now we are pinned at 1.x: #7916