Rules for context array should be get values with `->getConstantArrays()`

[sasezaki]

• ContextKeyRule
• ContextRequireExceptionKeyRule
  • seems useless. currently already variable array is supported, and union type is not supported. union type support is meaningless for this rule.
• also PlaceholderCorrespondToKeysRule

current implementations only checks dynamic parameter $logger->info('foo', ['key' => 'bar']);.
Rules should be checked with phpdoc parameter, method scope array variable( $context = ['key' => 'bar']; $logger->info('foo', $context); )