[internal/aws] migrate to AWS v2 SDK

[crobert-1]

Component(s)

internal/aws

Describe the issue you're reporting

AWS has annouced that it will be discontinuing support for go AWS SDK v1 and we should be updating the collector to migrate away from it to ensure any issues with the package are dealt with.

https://aws.amazon.com/blogs/developer/announcing-end-of-support-for-aws-sdk-for-go-v1-on-july-31-2025/

[github-actions]

Pinging code owners:

• internal/aws: @Aneurysm9 @mxiamxia

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[Avinash-Acharya]

Hey @crobert-1 . I was going through this issue, when I got across this one particular code section at opentelemetry-collector-contrib/internal/aws/awsutil/conn.go

func getSTSCredsFromPrimaryRegionEndpoint(logger *zap.Logger, t aws.Config, roleArn string,
	region string,
) *stscreds.AssumeRoleProvider {
	logger.Info("Credentials for provided RoleARN being fetched from STS primary region endpoint.")
	partitionID := getPartition(region)
	switch partitionID {
	// case endpoints.AwsPartitionID:
	case endpoints.AwsPartitionID:
		return getSTSCredsFromRegionEndpoint(logger, t, endpoints.UsEast1RegionID, roleArn)
	case endpoints.AwsCnPartitionID:
		return getSTSCredsFromRegionEndpoint(logger, t, endpoints.CnNorth1RegionID, roleArn)
	case endpoints.AwsUsGovPartitionID:
		return getSTSCredsFromRegionEndpoint(logger, t, endpoints.UsGovWest1RegionID, roleArn)
	}

	return nil
}

I can't find a way to migrate from "github.com/aws/aws-sdk-go/aws/endpoints" to "github.com/aws/smithy-go/endpoints" Based on what the doc has to say.
The new endpoints does not seems to have the us or cn value based endpoints for conditional cases.