feature #47730 Ban DateTime from the codebase (WebMamba)

This PR was squashed before being merged into the 6.2 branch.

Discussion
----------

Ban DateTime from the codebase

| Q             | A
| ------------- | ---
| Branch?       | 6.2
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | yes
| Tickets       | #47580
| License       | MIT
| Doc PR        | symfony

As discuss in this issue, the purpose of this PR is to remove DateTime from the code base in favor to DateTimeImmutable. I will process it component by component. Feel free to discuss!

Commits
-------

689385a83f Ban DateTime from the codebase

Author: fabpot

Tests/Fixtures/ReturnTyped.php

@@ -21,11 +21,11 @@ public function getFoos(): array
         return 'It doesn\'t respect the return type on purpose';
     }
 
-    public function addFoo(\DateTime $dateTime)
+    public function addFoo(\DateTimeImmutable $dateTime)
     {
     }
 
-    public function removeFoo(\DateTime $dateTime)
+    public function removeFoo(\DateTimeImmutable $dateTime)
     {
     }
 

Tests/Fixtures/TestClassTypeErrorInsideCall.php

@@ -13,7 +13,7 @@
 
 class TestClassTypeErrorInsideCall
 {
-    public function expectsDateTime(\DateTime $date)
+    public function expectsDateTime(\DateTimeImmutable $date)
     {
     }
 

Tests/Fixtures/TypeHinted.php

@@ -23,7 +23,7 @@ class TypeHinted
      */
     private $countable;
 
-    public function setDate(\DateTime $date)
+    public function setDate(\DateTimeImmutable $date)
     {
         $this->date = $date;
     }

Tests/PropertyAccessorTest.php

@@ -632,24 +632,24 @@ public function testIsWritableForReferenceChainIssue($object, $path, $value)
     public function testThrowTypeError()
     {
         $this->expectException(InvalidArgumentException::class);
-        $this->expectExceptionMessage('Expected argument of type "DateTime", "string" given at property path "date"');
+        $this->expectExceptionMessage('Expected argument of type "DateTimeImmutable", "string" given at property path "date"');
         $object = new TypeHinted();
 
-        $this->propertyAccessor->setValue($object, 'date', 'This is a string, \DateTime expected.');
+        $this->propertyAccessor->setValue($object, 'date', 'This is a string, \DateTimeImmutable expected.');
     }
 
     public function testThrowTypeErrorWithNullArgument()
     {
         $this->expectException(InvalidArgumentException::class);
-        $this->expectExceptionMessage('Expected argument of type "DateTime", "null" given');
+        $this->expectExceptionMessage('Expected argument of type "DateTimeImmutable", "null" given');
         $object = new TypeHinted();
 
         $this->propertyAccessor->setValue($object, 'date', null);
     }
 
     public function testSetTypeHint()
     {
-        $date = new \DateTime();
+        $date = new \DateTimeImmutable();
         $object = new TypeHinted();
 
         $this->propertyAccessor->setValue($object, 'date', $date);
@@ -774,7 +774,7 @@ public function testDoNotDiscardReturnTypeError()
         $this->expectException(\TypeError::class);
         $object = new ReturnTyped();
 
-        $this->propertyAccessor->setValue($object, 'foos', [new \DateTime()]);
+        $this->propertyAccessor->setValue($object, 'foos', [new \DateTimeImmutable()]);
     }
 
     public function testDoNotDiscardReturnTypeErrorWhenWriterMethodIsMisconfigured()