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.

admin/tool/uploadcourse/classes/step1_form.php

@@ -39,7 +39,7 @@ class tool_uploadcourse_step1_form extends tool_uploadcourse_base_form {
      * The standard form definiton.
      * @return void
      */
-    public function definition () {
+    public function definition() {
         $mform = $this->_form;
 
         $mform->addElement('header', 'generalhdr', get_string('general'));