chore: add maxAttemptsDefaultProvider in runtimeConfig

[trivikr]

Issue #, if available:
Follow-up to #1282

Description of changes:
adds maxAttemptsDefaultProvider in runtimeConfig

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[codecov-commenter]

Codecov Report

Merging #1284 into master will increase coverage by 0.10%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1284      +/-   ##
==========================================
+ Coverage   73.04%   73.15%   +0.10%     
==========================================
  Files         287      290       +3     
  Lines       12730    12780      +50     
  Branches     2922     2933      +11     
==========================================
+ Hits         9299     9349      +50     
  Misses       3431     3431              

Impacted Files	Coverage Δ
clients/client-s3/S3Client.ts	94.11% <0.00%> (ø)
clients/client-s3/runtimeConfig.ts	100.00% <0.00%> (ø)
packages/region-provider/src/fromEnv.ts	100.00% <0.00%> (ø)
protocol_tests/aws-ec2/runtimeConfig.ts	100.00% <0.00%> (ø)
protocol_tests/aws-json/runtimeConfig.ts	100.00% <0.00%> (ø)
protocol_tests/aws-query/runtimeConfig.ts	100.00% <0.00%> (ø)
protocol_tests/aws-ec2/EC2ProtocolClient.ts	92.30% <0.00%> (ø)
protocol_tests/aws-restxml/runtimeConfig.ts	100.00% <0.00%> (ø)
protocol_tests/aws-restjson/runtimeConfig.ts	100.00% <0.00%> (ø)
protocol_tests/aws-json/JsonProtocolClient.ts	92.30% <0.00%> (ø)
... and 8 more

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[alexforsyth]

LGTM, Minor comment about the use of any

[github-actions]

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