Zhessler add dsql auth token generator

[Velfi]

Description

This adds an auth token generator that works like the existing RDS auth token generator, but for a new service: DSQL.

To generate the DSQL SDK, run this command from the root of the project:

./gradlew :aws:sdk:assemble -Paws.services=+sts,+sso,+ssooidc,+dsql

Then, to run the auth token generator tests:

cd aws/sdk/build/aws-sdk/sdk/dsql
cargo test signing_works --all-features

Testing

tests are included in the inlineable

Checklist

• For changes to the AWS SDK, generated SDK code, or SDK runtime crates, I have created a changelog entry Markdown file in the .changelog directory, specifying "aws-sdk-rust" in the applies_to key.

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[github-actions]

A new generated diff is ready to view.

• No codegen difference in the AWS SDK
• Client Test (ignoring whitespace)
• No codegen difference in the Server Test
• No codegen difference in the Server Test Python
• No codegen difference in the Server Test Typescript

A new doc preview is ready to view.

[ysaito1001]

For server codegen CI failure, I think it'll go away if we just re-run failed job.

[github-actions]

A new generated diff is ready to view.

• No codegen difference in the AWS SDK
• Client Test (ignoring whitespace)
• No codegen difference in the Server Test
• No codegen difference in the Server Test Python
• No codegen difference in the Server Test Typescript

A new doc preview is ready to view.

[github-actions]

A new generated diff is ready to view.

• No codegen difference in the AWS SDK
• Client Test (ignoring whitespace)
• Server Test (ignoring whitespace)
• No codegen difference in the Server Test Python
• No codegen difference in the Server Test Typescript

A new doc preview is ready to view.