Option To Use OldCalculatedValue in ToArray and its Relatives

Fix #1810, just before it turns 6 years old. Reporter thinks it can save time. Easy to implement, especially with the advent of named parameters which were not available when issue was opened.

tests/PhpSpreadsheetTests/Worksheet/ToArrayOldCalculatedValueTest.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Worksheet;
+
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheetTests\Functional\AbstractFunctional;
+
+class ToArrayOldCalculatedValueTest extends AbstractFunctional
+{
+    public function testOldCalculatedValue(): void
+    {
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->fromArray([['A', 'B', 'C', '=1+2']]);
+        $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Xlsx');
+        $spreadsheet->disconnectWorksheets();
+        $rsheet = $reloadedSpreadsheet->getActiveSheet();
+        $rsheet->setCellValue('D1', '=1+3');
+        $array1 = $rsheet->toArray(formatData: false, calculateFormulas: false, oldCalculatedValue: true);
+        self::assertSame([['A', 'B', 'C', 3]], $array1, 'uses value as read from spreadsheet');
+        $array2 = $rsheet->toArray(formatData: false);
+        self::assertSame([['A', 'B', 'C', 4]], $array2, 'uses newly calculated value');
+
+        $reloadedSpreadsheet->disconnectWorksheets();
+    }
+}