[12.x] add generics to aggregate related methods and properties (#55628)

* [12.x] add generics to aggregate related methods

* revert unrelated

Author: taka-oyama

src/Illuminate/Database/Query/Builder.php

@@ -90,7 +90,10 @@ class Builder implements BuilderContract
     /**
      * An aggregate function and column to be run.
      *
-     * @var array|null
+     * @var array{
+     *     function: string,
+     *     columns: array<\Illuminate\Contracts\Database\Query\Expression|string>
+     * }|null
      */
     public $aggregate;
 
@@ -3653,7 +3656,7 @@ public function numericAggregate($function, $columns = ['*'])
      * Set the aggregate property without running the query.
      *
      * @param  string  $function
-     * @param  array  $columns
+     * @param  array<\Illuminate\Contracts\Database\Query\Expression|string>  $columns
      * @return $this
      */
     protected function setAggregate($function, $columns)

src/Illuminate/Database/Query/Grammars/Grammar.php

@@ -123,7 +123,7 @@ protected function compileComponents(Builder $query)
      * Compile an aggregated select clause.
      *
      * @param  \Illuminate\Database\Query\Builder  $query
-     * @param  array  $aggregate
+     * @param  array{function: string, columns: array<\Illuminate\Contracts\Database\Query\Expression|string>}  $aggregate
      * @return string
      */
     protected function compileAggregate(Builder $query, $aggregate)