[PHPUnit 11.5] Add AssertContainsOnlyMethodCallRector, bond deprecated generic asserts to phpunit >=11.5

[TomasVotruba]

PHPUnit 11.5 deprecated the generic assertContainsOnly() and isType() assertions and added type-specific replacements for both (#6055, #6052).

Neither was handled for projects actually running PHPUnit 11.5:

• there was no rule for assertContainsOnly() at all
• AssertIsTypeMethodCallRector existed, but only in the phpunit120.php set. ComposerTriggeredSet matches with ^ + version, so on phpunit/phpunit 11.5.x only phpunit110.php is loaded and the rule never ran — despite the deprecation landing in 11.5.

New rule: AssertContainsOnlyMethodCallRector

 final class SomeTest extends TestCase
 {
     public function test(): void
     {
-        $this->assertContainsOnly('string', ['a', 'b']);
+        $this->assertContainsOnlyString(['a', 'b']);
-        self::assertContainsOnly('int', [1], null, 'some message');
+        self::assertContainsOnlyInt([1], 'some message');
     }
 }

The $isNativeType argument is dropped when it is absent, null or true. When it is false or an unresolvable expression the type may be a class name, so the call is skipped.

Version bonding

Both rules now implement ComposerPackageConstraintInterface (rectorphp/rector-src#7877):

public function provideComposerPackageConstraint(): ComposerPackageConstraint
{
    return new ComposerPackageConstraint('phpunit/phpunit', '>=11.5');
}

ComposerTriggeredSet matches with ^ + version and is not cumulative, so a project on PHPUnit 12 never loads phpunit110.php. Both rules are therefore registered in the phpunit110.php, phpunit120.php and phpunit130.php sets — someone upgrading straight from 11.4 to 12.0 still gets them. AssertIsTypeMethodCallRector keeps its current class name, so nothing breaks for existing PHPUnit 12 users.

The >=11.5 constraint is what keeps both rules from firing on 11.0–11.4, where the type-specific methods do not exist yet.

Needed rectorphp/rector-src#8237 (merged) — the autowired InstalledPackageResolver behind ComposerPackageConstraintFilter lost its cwd fallback, so every rule implementing ComposerPackageConstraintInterface threw The installed package json not found.