Tests: Second pass at merging file-level and class-level DocBlocks in various unit test files.

Per the[https://developer.wordpress.org/coding-standards/inline-documentation-standards/php/#6-file-headers documentation standards], whenever possible, all WordPress files should contain a header DocBlock, regardless of the file’s contents – this includes files containing classes.

However, this recommendation makes less sense for unit test classes if not applied consistently, and the duplicate tags cause some confusion.

This commit aims to reduce confusion and avoid repeating information by combining the DocBlocks.

Follow-up to [55337].

Props sakibmd, fuadragib, robinwpdeveloper, naeemhaque, seakashdiu, jakariaistauk, hasanmisbah, SergeyBiryukov.
Fixes #57723.

git-svn-id: https://develop.svn.wordpress.org/trunk@55457 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

tests/phpunit/tests/block-supports/layout.php

@@ -1,16 +1,10 @@
 <?php
 /**
- * Block supports tests for the layout.
+ * Tests for block supports related to layout.
  *
  * @package WordPress
  * @subpackage Block Supports
  * @since 6.0.0
- */
-
-/**
- * Tests for block supports related to layout.
- *
- * @since 6.0.0
  *
  * @group block-supports
  *

tests/phpunit/tests/block-template-utils.php

@@ -1,12 +1,8 @@
 <?php
 /**
- * Tests_Block_Template_Utils class
+ * Tests for the Block Templates abstraction layer.
  *
  * @package WordPress
- */
-
-/**
- * Tests for the Block Templates abstraction layer.
  *
  * @group block-templates
  */

tests/phpunit/tests/block-template.php

@@ -1,12 +1,8 @@
 <?php
 /**
- * Tests_Block_Template class
+ * Tests for the block template loading algorithm.
  *
  * @package WordPress
- */
-
-/**
- * Tests for the block template loading algorithm.
  *
  * @group block-templates
  */

tests/phpunit/tests/blocks/context.php

@@ -1,16 +1,10 @@
 <?php
 /**
- * Block context tests
+ * Tests for block context functions.
  *
  * @package WordPress
  * @subpackage Blocks
  * @since 5.5.0
- */
-
-/**
- * Tests for block context functions.
- *
- * @since 5.5.0
  *
  * @group blocks
  */

tests/phpunit/tests/blocks/editor.php

@@ -1,16 +1,10 @@
 <?php
 /**
- * Block editor tests
+ * Tests for the block editor methods.
  *
  * @package WordPress
  * @subpackage Blocks
  * @since 5.5.0
- */
-
-/**
- * Tests for the block editor methods.
- *
- * @since 5.5.0
  *
  * @group blocks
  */

tests/phpunit/tests/blocks/register.php

@@ -1,16 +1,10 @@
 <?php
 /**
- * Block registration tests
+ * Tests for register_block_type(), unregister_block_type(), get_dynamic_block_names(), and register_block_style().
  *
  * @package WordPress
  * @subpackage Blocks
  * @since 5.0.0
- */
-
-/**
- * Tests for register_block_type(), unregister_block_type(), get_dynamic_block_names(), and register_block_style().
- *
- * @since 5.0.0
  *
  * @group blocks
  */

tests/phpunit/tests/blocks/render.php

@@ -1,16 +1,10 @@
 <?php
 /**
- * Block rendering tests
+ * Tests for block rendering functions.
  *
  * @package WordPress
  * @subpackage Blocks
  * @since 5.0.0
- */
-
-/**
- * Tests for block rendering functions.
- *
- * @since 5.0.0
  *
  * @group blocks
  */

tests/phpunit/tests/blocks/renderCommentTemplate.php

@@ -1,16 +1,10 @@
 <?php
 /**
- * Comment Template block rendering tests.
+ * Tests for the Comment Template block rendering.
  *
  * @package WordPress
  * @subpackage Blocks
  * @since 6.0.0
- */
-
-/**
- * Tests for the Comment Template block.
- *
- * @since 6.0.0
  *
  * @group blocks
  */

tests/phpunit/tests/blocks/renderReusable.php

@@ -1,16 +1,10 @@
 <?php
 /**
- * Reusable block rendering tests
+ * Tests for reusable block rendering.
  *
  * @package WordPress
  * @subpackage Blocks
  * @since 5.0.0
- */
-
-/**
- * Tests for reusable block rendering.
- *
- * @since 5.0.0
  *
  * @group blocks
  */

tests/phpunit/tests/blocks/serialize.php

@@ -1,14 +1,9 @@
 <?php
 /**
- * Block serialization tests
+ * Tests for block serialization functions.
  *
  * @package WordPress
  * @subpackage Blocks
- * @since 5.3.3
- */
-
-/**
- * Tests for block serialization functions.
  *
  * @since 5.3.3
  *