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/classes/plugininfo/base.php

@@ -428,7 +428,7 @@ abstract class base {
      * @param int $branch the moodle branch number
      * @return bool true if not incompatible with moodle branch
      */
-    public function is_core_compatible_satisfied(int $branch) : bool {
+    public function is_core_compatible_satisfied(int $branch): bool {
         if (!empty($this->pluginincompatible) && ($branch >= $this->pluginincompatible)) {
             return false;
         } else {