fix(codegen): add aws-iam-traits dependency

[srchase]

Adds the aws-iam-traits dependency so that models that include these traits will be able to resolve the traits and successfully generate clients.

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[codecov-io]

Codecov Report

Merging #1686 (6e40ee3) into master (de75f7e) will decrease coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1686      +/-   ##
==========================================
- Coverage   79.77%   79.70%   -0.08%     
==========================================
  Files         325      328       +3     
  Lines       12087    12569     +482     
  Branches     2553     2668     +115     
==========================================
+ Hits         9643    10018     +375     
- Misses       2444     2551     +107     

Impacted Files	Coverage Δ
...tocol_tests/aws-restxml/commands/XmlMapsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...ocol_tests/aws-restxml/commands/XmlBlobsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...ocol_tests/aws-restxml/commands/XmlEnumsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...ocol_tests/aws-restxml/commands/XmlListsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...col_tests/aws-restjson/commands/JsonMapsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...ol_tests/aws-restjson/commands/JsonBlobsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...ol_tests/aws-restjson/commands/JsonEnumsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...ol_tests/aws-restjson/commands/JsonListsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...tests/aws-restxml/commands/XmlAttributesCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...tests/aws-restxml/commands/XmlNamespacesCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
... and 103 more

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[trivikr]

@srchase Please rebase from master to enable CI with GitHub Actions.
Fix merged in PR #1684

[github-actions]

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