chore(config-resolver): refactor regionInfo types to improve readability

[trivikr]

Issue

Internal JS-2904

Description

Moves RegionHash and PartitionHash to new files to simplify exports/imports.
Defines Options interface in each files to avoid including redundant options and extending multile interfaces.

Testing

CI

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[codecov-commenter]

Codecov Report

Merging #2934 (be93e5b) into main (5e1d297) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head be93e5b differs from pull request most recent head ea5272e. Consider uploading reports for the commit ea5272e to get more accurate results

@@            Coverage Diff             @@
##             main    #2934      +/-   ##
==========================================
- Coverage   58.57%   58.57%   -0.01%     
==========================================
  Files         558      558              
  Lines       30249    30248       -1     
  Branches     7443     7443              
==========================================
- Hits        17719    17718       -1     
  Misses      12530    12530              

Impacted Files	Coverage Δ
...ig-resolver/src/regionInfo/getResolvedPartition.ts	100.00% <ø> (ø)
...fig-resolver/src/regionInfo/getHostnameTemplate.ts	100.00% <100.00%> (ø)
...es/config-resolver/src/regionInfo/getRegionInfo.ts	100.00% <100.00%> (ø)
...fig-resolver/src/regionInfo/getResolvedHostname.ts	100.00% <100.00%> (ø)
clients/client-sts/src/endpoints.ts	100.00% <0.00%> (ø)
protocol_tests/aws-ec2/src/endpoints.ts	100.00% <0.00%> (ø)
protocol_tests/aws-json/src/endpoints.ts	100.00% <0.00%> (ø)
protocol_tests/aws-query/src/endpoints.ts	100.00% <0.00%> (ø)
clients/client-s3-control/src/endpoints.ts	100.00% <0.00%> (ø)
protocol_tests/aws-json-10/src/endpoints.ts	100.00% <0.00%> (ø)
... and 5 more

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[AllanZhengYP]

Looks awesome! 🚀

[github-actions]

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