Add chisel3.stage Annotations

This adds the following FIRRTL Annotations to Chisel:

- NoRunFirrtlCompilerAnnotation
- PrintFullStackTraceAnnotation
- ChiselGeneratorAnnotation
- ChiselCircuitAnnotation
- ChiselOutputFileAnnotation

This includes tests for ChiselGeneratorAnnotation as this Annotation
is able to be constructed from a String and to elaborate itself.

Co-Authored-By: Schuyler Eldridge <schuyler.eldridge@ibm.com>
Co-Authored-By: chick <chick@qrhino.com>
Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>