S3TransferManagerAutoConfiguration doesn't use static credential/region provider

[MilosHavranek]

Type: Bug

Component: "S3"

Describe the bug
In AWSpring 3.3.1 it is noted that AWS launched new high level utility S3TransferManager
here: https://docs.awspring.io/spring-cloud-aws/docs/3.3.1/reference/html/index.html#using-s3transfermanager-and-crt-based-s3-client
With it on the classpath, classic S3 components are configured normally and create StaticCredentialsProvider.. which they use, however everything under S3TransferManager (S3TransferManagerAutoConfiguration) tries to obtain credentials/region through AWS SDK means (ENV property, instance profile, ...).

Sample

spring:
  cloud:
    aws:
      s3:
        enabled: true
      credentials:
        access-key: changeme
        secret-key: changeme
      region:
        static: changeme

pom.xml of Spring Boot 3.4.6, Spring Cloud 2024.0.1

    <!-- AWS Dependencies -->
    <dependency>
      <groupId>io.awspring.cloud</groupId>
      <artifactId>spring-cloud-aws-starter-s3</artifactId>
      <exclusions>
        <exclusion>
          <groupId>commons-logging</groupId>
          <artifactId>commons-logging</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>software.amazon.awssdk</groupId>
      <artifactId>s3-transfer-manager</artifactId>
      <exclusions>
        <exclusion>
          <groupId>commons-logging</groupId>
          <artifactId>commons-logging</artifactId>
        </exclusion>
      </exclusions>
    </dependency>