Binding AWS Kinesis - reuse client credentials

[soisyourface]

Description

Should remove the need to define the AWS secret(key, id, session) information in the binding definition and instead use the existing AWS mechanisms of using metadata server, env, config, and other methods.

TODO: update documentation and code to be more obvious on what is going on. Also, will add a few lines about how this will create a DynamoDB table and how it is named.

Issue reference

Implements issue #3508

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation / Created issue in the https://github.com/dapr/docs/ repo: dapr/docs#[issue number]

[marcduiker]

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