Generic/DisallowLongArraySyntax: improve code coverage

This commit adds two safeguard tests that do not trigger the sniff as
they use the array keyword in a method definition and a method call.

It also updates one of the existing tests to declare an array using
array in uppercase. This is already handled correctly by PHPCS but it
was not documented in a test.

Author: rodrigoprimo

src/Standards/Generic/Tests/Arrays/DisallowLongArraySyntaxUnitTest.1.inc

@@ -3,7 +3,7 @@ $var = array();
 $var = [1,2,3];
 $var = array(1,2,3);
 echo $var[1];
-$foo = array($var[1],$var[2]);
+$foo = ARRAY($var[1],$var[2]);
 $foo = array(
         1,
         2,
@@ -25,3 +25,9 @@ array_map(
     static fn (array $value): array => array_filter($value),
     []
 );
+
+class Foo {
+    function array() {}
+}
+
+$obj->array( 1, 2, 3 );

src/Standards/Generic/Tests/Arrays/DisallowLongArraySyntaxUnitTest.1.inc.fixed

@@ -25,3 +25,9 @@ array_map(
     static fn (array $value): array => array_filter($value),
     []
 );
+
+class Foo {
+    function array() {}
+}
+
+$obj->array( 1, 2, 3 );