Support &dyn Trait

[fzyzcjy]

Changes

Please list issues fixed by this PR here, using format "Fixes #the-issue-number".

Checklist

• An issue to be fixed by this PR is listed above.
• New tests are added to ensure new features are working. Please refer to this page to see how to add a test.
• ./frb_internal precommit --mode slow (or fast) is run (it internal runs code generator, does auto formatting, etc).
• If this PR adds/changes features, documentations (in the ./website folder) are updated.
• CI is passing. Please refer to this page to see how to solve a failed CI.

Remark for PR creator

• ./frb_internal --help shows utilities for development.
• If fzyzcjy does not reply for a few days, maybe he just did not see it, so please ping him.

[codecov]

Codecov Report

Attention: Patch coverage is 98.90909% with 3 lines in your changes missing coverage. Please review.

Project coverage is 99.08%. Comparing base (8dbd4c2) to head (c0d450b).

Files	Patch %	Lines
...wire/rust/spec_generator/misc/function/lockable.rs	87.50%	1 Missing ⚠️
..._codegen/src/library/codegen/ir/mir/ty/delegate.rs	97.29%	1 Missing ⚠️
...brary/codegen/parser/mir/parser/ty/trait_object.rs	97.61%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2054      +/-   ##
==========================================
+ Coverage   94.99%   99.08%   +4.09%     
==========================================
  Files         463      470       +7     
  Lines       17047    18564    +1517     
==========================================
+ Hits        16193    18394    +2201     
+ Misses        854      170     -684     

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