fix(client-*): update endpoint provider

[AllanZhengYP]

Fixes #1817

• generate endpoint from the EndpointPrefix trait introduced in Smithy 1.5.0
• update all the endpoint.ts as of 2020/12/21

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov-io]

Codecov Report

Merging #1824 (16aa088) into master (de75f7e) will decrease coverage by 0.47%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1824      +/-   ##
==========================================
- Coverage   79.77%   79.30%   -0.48%     
==========================================
  Files         325      368      +43     
  Lines       12087    15132    +3045     
  Branches     2553     3222     +669     
==========================================
+ Hits         9643    12001    +2358     
- Misses       2444     3131     +687     

Impacted Files	Coverage Δ
protocol_tests/aws-json/models/models_0.ts	79.36% <0.00%> (-20.64%)	⬇️
packages/util-user-agent-node/src/index.ts	88.88% <0.00%> (-11.12%)	⬇️
protocol_tests/aws-restjson/models/models_0.ts	89.43% <0.00%> (-10.57%)	⬇️
...rotocol_tests/aws-restxml/protocols/Aws_restXml.ts	64.10% <0.00%> (-2.15%)	⬇️
...ackages/node-http-handler/src/node-http-handler.ts	98.00% <0.00%> (-2.00%)	⬇️
packages/middleware-sdk-sqs/src/send-message.ts	86.66% <0.00%> (-0.84%)	⬇️
protocol_tests/aws-query/protocols/Aws_query.ts	66.34% <0.00%> (-0.38%)	⬇️
...kages/middleware-sdk-sqs/src/send-message-batch.ts	92.30% <0.00%> (-0.29%)	⬇️
...kages/fetch-http-handler/src/fetch-http-handler.ts	9.30% <0.00%> (-0.23%)	⬇️
protocol_tests/aws-ec2/protocols/Aws_ec2.ts	66.93% <0.00%> (-0.01%)	⬇️
... and 195 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update fc98d2d...16aa088. Read the comment docs.

[trivikr]

LGTM! But requesting changes to delete VSCode Settings file.

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs and link to relevant comments in this thread.