feat: add support for per service options to Config

[Aakkash-Suresh]

Summary

Implements the feature requested in #3141 to allow aws.Config to hold service specific options that are automatically applied during client construction.

Problem

Currently, service specific options must be manually passed to each client creation:

ddbClient1 := dynamodb.NewFromConfig(cfg, func(o *dynamodb.Options) {
    o.DisableValidateResponseChecksum = true
})
ddbClient2 := dynamodb.NewFromConfig(cfg, func(o *dynamodb.Options) {
    o.DisableValidateResponseChecksum = true
})

Solution

Add service-specific options to aws.Config that are automatically applied during client construction:

cfg := aws.NewConfig().
    WithRegion("us-west-2").
    WithServiceOptions("DynamoDB", func(opts any) {
        if ddbOpts, ok := opts.(*dynamodb.Options); ok {
            ddbOpts.DisableValidateResponseChecksum = true
        }
    })

// Options are automatically applied
ddbClient1 := dynamodb.NewFromConfig(cfg)
ddbClient2 := dynamodb.NewFromConfig(cfg)

Related Issue

Closes #3141

[lucix-aws]

You're going to need to regenerate the service clients since this includes a codegen change.

[Aakkash-Suresh]

You're going to need to regenerate the service clients since this includes a codegen change.

Service clients have been regenerated. All api_client.go files now include the ApplyServiceOptions call.

@lucix-aws Let me know if i'm missing something here.

[rittneje]

@lucix-aws Is there anything still pending for this change?

[lucix-aws]

I'll try to find time to look at it again this week.

[lucix-aws]

Ignore failing integration tests and codegen tests.