fix(amplify-nodejs-function-runtime-provider): fix lambda error format

[SwaySway]

Issue #, if available:
fix #5553
Description of changes:
return proper error message and stack if a string error is provided return string error as is

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Merging #6350 (69f1559) into master (8486632) will increase coverage by 0.00%.
The diff coverage is 87.50%.

@@           Coverage Diff            @@
##           master    #6350    +/-   ##
========================================
  Coverage   57.20%   57.21%            
========================================
  Files         473      474     +1     
  Lines       21595    21599     +4     
  Branches     4075     4292   +217     
========================================
+ Hits        12354    12358     +4     
+ Misses       8381     8361    -20     
- Partials      860      880    +20     

Impacted Files	Coverage Δ
...ejs-function-runtime-provider/src/utils/execute.ts	71.92% <0.00%> (ø)
...dejs-function-runtime-provider/src/utils/invoke.ts	87.87% <100.00%> (-0.36%)	⬇️
...function-runtime-provider/src/utils/invokeUtils.ts	100.00% <100.00%> (ø)
packages/amplify-util-mock/src/api/api.ts	0.00% <0.00%> (ø)
packages/graphql-mapping-template/src/print.ts	35.29% <0.00%> (ø)
packages/amplify-util-mock/src/storage/storage.ts	0.00% <0.00%> (ø)
...ges/amplify-util-mock/src/CFNParser/stack/index.ts	0.00% <0.00%> (ø)
...es/amplify-util-mock/src/api/resolver-overrides.ts	0.00% <0.00%> (ø)
...es/graphql-transformer-core/src/stripDirectives.ts	35.29% <0.00%> (ø)
.../amplify-cli-core/src/state-manager/pathManager.ts	67.44% <0.00%> (ø)
... and 13 more

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[edwardfoyle]

one typo and one clarification question

[github-actions]

This pull request has been automatically locked since there hasn't been any recent activity after it was closed. Please open a new issue for related bugs.

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