feat: simplify and add extensive tests got config-resolver

[trivikr]

Issue #, if available:
Internal issue JS-1834

Description of changes:
simplifies and add tests for config-resolver

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[codecov-commenter]

Codecov Report

Merging #1401 into master will increase coverage by 0.39%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1401      +/-   ##
==========================================
+ Coverage   79.08%   79.48%   +0.39%     
==========================================
  Files         287      296       +9     
  Lines       11155    11385     +230     
  Branches     2360     2433      +73     
==========================================
+ Hits         8822     9049     +227     
- Misses       2333     2336       +3     

Impacted Files	Coverage Δ
...al-provider-imds/src/remoteProvider/httpRequest.ts
...edential-provider-imds/src/fromInstanceMetadata.ts
...edential-provider-imds/src/remoteProvider/retry.ts
...dential-provider-imds/src/fromContainerMetadata.ts
...ider-imds/src/remoteProvider/RemoteProviderInit.ts
...rovider-imds/src/remoteProvider/ImdsCredentials.ts
.../credential-provider-process/dist/cjs/src/index.ts	92.50% <0.00%> (ø)
...s/remoteProvider/src/remoteProvider/httpRequest.ts	100.00% <0.00%> (ø)
...kages/shared-ini-file-loader/dist/cjs/src/index.ts	100.00% <0.00%> (ø)
...rovider-imds/dist/cjs/src/fromContainerMetadata.ts	100.00% <0.00%> (ø)
... and 11 more

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