Improvements to C# analysis

Changes to existing queries

Query	Expected impact	Change
Class defines a field that uses an ICryptoTransform class in a way that would be unsafe for concurrent threads (`cs/thread-unsafe-icryptotransform-field-in-class`)	Fewer false positive results	The criteria for a result has changed to include nested properties, nested fields and collections. The format of the alert message has changed to highlight the static field.

The class Attribute has two new predicates: getConstructorArgument() and getNamedArgument(). The first predicate returns arguments to the underlying constructor call and the latter returns named arguments for initializing fields and properties.