PhpUnit 10 Compatibility Part 2 (#3526)

Successor to PR #3523. There are 494 single-line changes (`public function provider` to `public static function provider`) in this PR. None of these were made manually; they were all created with the following script (adapted from
https://stackoverflow.com/questions/25909820/how-to-recursively-iterate-through-files-in-php):
```php
$dir = 'C:/git/unit10prep2/tests/PhpSpreadsheetTests';
$it = new RecursiveDirectoryIterator($dir);

// Loop through files
foreach(new RecursiveIteratorIterator($it) as $file) {
    if ($file->getExtension() === 'php') {
        $contents = file_get_contents($file);
        $new = preg_replace('/public function (\\w*)([Pp])rovider/', 'public static function $1$2rovider', $contents);
        if ($new !== $contents) {
            echo "changing $file\n";
            file_put_contents($file, $new);
        }
    }
}
```

After this PR, there will be one more, with a small number of test changes, and enabling PhpUnit 10 for Php 8.1+.

tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/AcothTest.php

@@ -25,7 +25,7 @@ class AcothTest extends AllSetupTeardown
         self::assertEqualsWithDelta($expectedResult, $result, 1E-9);
     }
 
-    public function providerACOTH(): array
+    public static function providerACOTH(): array
     {
         return require 'tests/data/Calculation/MathTrig/ACOTH.php';
     }
@@ -42,7 +42,7 @@ class AcothTest extends AllSetupTeardown
         self::assertEqualsWithDelta($expectedResult, $result, 1.0e-14);
     }
 
-    public function providerAcothArray(): array
+    public static function providerAcothArray(): array
     {
         return [
             'row vector' => [[[-0.20273255405408, 0.54930614433406, 0.13413199329734]], '{-5, 2, 7.5}'],