feat: log clientName and commandName

[trivikr]

Issue #, if available:
Codegen for: smithy-lang/smithy-typescript#230
Fixes: #1489

Description of changes:
feat: log clientName and commandName.

Code

const { DynamoDB } = require("/home/trivikr/workspace/aws-sdk-js-v3/clients/client-dynamodb");

(async () => {
  const region = "us-west-2";
  const logger = { info: console.log };

  const client = new DynamoDB({ region, logger });
  await client.listTables({ Limit: 1 });
})();

Output

{ clientName: 'DynamoDBClient', commandName: 'ListTablesCommand' }
{ input: { Limit: 1 } }
{
  output: {
    LastEvaluatedTableName: 'CUSTOMER_LIST',
    TableNames: [ 'CUSTOMER_LIST' ]
  }
}
{
  '$metadata': {
    httpStatusCode: 200,
    httpHeaders: {
      server: 'Server',
      date: 'Thu, 29 Oct 2020 00:07:40 GMT',
      'content-type': 'application/x-amz-json-1.0',
      'content-length': '73',
      connection: 'keep-alive',
      'x-amzn-requestid': 'NL79U75I1LNUOVK5IBPD5JES0BVV4KQNSO5AEMVJF66Q9ASUAAJG',
      'x-amz-crc32': '773170490'
    },
    requestId: 'NL79U75I1LNUOVK5IBPD5JES0BVV4KQNSO5AEMVJF66Q9ASUAAJG',
    attempts: 1,
    totalRetryDelay: 0
  }
}

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[codecov-io]

Codecov Report

Merging #1637 into master will decrease coverage by 0.11%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1637      +/-   ##
==========================================
- Coverage   79.73%   79.62%   -0.12%     
==========================================
  Files         324      325       +1     
  Lines       12056    12503     +447     
  Branches     2547     2657     +110     
==========================================
+ Hits         9613     9955     +342     
- Misses       2443     2548     +105     

Impacted Files	Coverage Δ
...tocol_tests/aws-restxml/commands/XmlMapsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...ocol_tests/aws-restxml/commands/XmlBlobsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...ocol_tests/aws-restxml/commands/XmlEnumsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...ocol_tests/aws-restxml/commands/XmlListsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...col_tests/aws-restjson/commands/JsonMapsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...ol_tests/aws-restjson/commands/JsonBlobsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...ol_tests/aws-restjson/commands/JsonEnumsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...ol_tests/aws-restjson/commands/JsonListsCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...tests/aws-restxml/commands/XmlAttributesCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
...tests/aws-restxml/commands/XmlNamespacesCommand.ts	95.65% <0.00%> (-4.35%)	⬇️
... and 95 more

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[AllanZhengYP]

I'm a little worried about clientName being populated in command instead of client. But it's a very minor issue.

[github-actions]

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