Deprecate BlackBoxResourceAnno

[seldridge]

Companion PR to chipsalliance/chisel#1954.

This deprecates BlackBoxResourceAnno. It's a weird API that requires finding a Java Resource. This is a weird thing to make a part of the Annotations API where the Java Resource API is effectively needed to implement a FIRRTL compiler. BlackBoxResourceAnno can be fully removed by resolving a resource during Chisel elaboration (what chipsalliance/chisel#1954 does).

Signed-off-by: Schuyler Eldridge [email protected]

Contributor Checklist

• [n/a] Did you add Scaladoc to every public function/method?
• [n/a] Did you update the FIRRTL spec to include every new feature/behavior?
• [n/a] Did you add at least one test demonstrating the PR?
• [n/a] Did you delete any extraneous printlns/debugging code?
• Did you specify the type of improvement?
• Did you state the API impact?
• Did you specify the code generation impact?
• Did you request a desired merge strategy?
• Did you add text to be included in the Release Notes for this change?

Type of Improvement

• API deprecation

API Impact

Deprecates BlackBoxResourceAnno.

Backend Code Generation Impact

None.

Desired Merge Strategy

• Squash: The PR will be squashed and merged (choose this if you have no preference.

Release Notes

Reviewer Checklist (only modified by reviewer)

• Did you add the appropriate labels?
• Did you mark the proper milestone (1.2.x, 1.3.0, 1.4.0) ?
• Did you review?
• Did you check whether all relevant Contributor checkboxes have been checked?
• Did you mark as Please Merge?