A5-2-2: Add changenote for c-style cast library macros

Author: lcartey

change_notes/2022-11-02-c-style-casts-library-macros.md

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+ - `A5-2-2` - `TraditionalCStyleCastsUsed.ql`
+   - Reduced false positives by excluding casts generated by library macros (i.e. macros defined outside the source location)
+   - Improved the message to cite the macro which generated the c-style cast, if any.
+   - Improved the message to cite the type being casted to, to aid with identification and remediation.