MDL-65292 style: Fix all function declarations white space

This has been generated running the following Sniffs, all
them part of the Moodle's CodeSniffer standard:
- PSR12.Functions.ReturnTypeDeclaration
- PSR12.Functions.NullableTypeDeclaration
- moodle.Methods.MethodDeclarationSpacing
- Squiz.Whitespace.ScopeKeywordSpacing

All them are, exclusively, about correct spacing, so the changes
are, all them, only white space changes.

Only exceptions to the above are 3 changes what were setting the
return type in a new line, and, when that happens, the closing
parenthesis (bracket) has to go to the same line than the colon.

lib/tests/task/logging_test.php

@@ -442,7 +442,7 @@ class logging_test extends \advanced_testcase {
      *
      * @return  adhoc_task
      */
-    protected function get_test_adhoc_task() : adhoc_task {
+    protected function get_test_adhoc_task(): adhoc_task {
         $task = $this->getMockForAbstractClass(adhoc_task::class);
         $task->set_component('core');
 
@@ -460,7 +460,7 @@ class logging_test extends \advanced_testcase {
      *
      * @return  scheduled_task
      */
-    protected function get_test_scheduled_task() : scheduled_task {
+    protected function get_test_scheduled_task(): scheduled_task {
         $task = $this->getMockForAbstractClass(scheduled_task::class);
 
         // Mock a lock on the task.
@@ -544,7 +544,7 @@ class logging_test_mocked_logger implements task_logger {
      *
      * @return  bool
      */
-    public static function is_configured() : bool {
+    public static function is_configured(): bool {
         return self::$isconfigured;
     }
 
@@ -569,7 +569,7 @@ class logging_test_mocked_logger implements task_logger {
      *
      * @return  bool
      */
-    public static function has_log_report() : bool {
+    public static function has_log_report(): bool {
         return self::$haslogreport;
     }
 
@@ -579,7 +579,7 @@ class logging_test_mocked_logger implements task_logger {
      * @param   string      $classname The task class to fetch for
      * @return  \moodle_url
      */
-    public static function get_url_for_task_class(string $classname) : \moodle_url {
+    public static function get_url_for_task_class(string $classname): \moodle_url {
         return new \moodle_url('');
     }