feat(invalid-dependency): add invalidAsyncFunction which rejects with an Error

[trivikr]

Issue #, if available:
Fixes: #1717

Description of changes:

• Adds invalidAsyncFunction which rejects with an Error.
• Calls invalidAsyncFunction for region and credentials providers, so that error will be thrown on provider await.

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[AllanZhengYP]

Looks good. Although it mixes in a few model change like this one: https://github.com/aws/aws-sdk-js-v3/pull/1719/files#diff-07e0dd2a293b067508c4dafbf9853415671ac466bbe6a8a092006424af26092fR25. I will approve it but please remove the diffs from the commands and models.

[codecov-io]

Codecov Report

Merging #1719 (2d76860) into master (de75f7e) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1719      +/-   ##
==========================================
- Coverage   79.77%   79.77%   -0.01%     
==========================================
  Files         325      331       +6     
  Lines       12087    12586     +499     
  Branches     2553     2675     +122     
==========================================
+ Hits         9643    10041     +398     
- Misses       2444     2545     +101     

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 126 more

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[trivikr]

Although it mixes in a few model change like this one: https://github.com/aws/aws-sdk-js-v3/pull/1719/files#diff-07e0dd2a293b067508c4dafbf9853415671ac466bbe6a8a092006424af26092fR25

This was an issue with a bad merge in master, which was fixed in #1732

This PR is now rebased, and ready for review.

[github-actions]

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