Add bedrock profile autoconfiguration support and replace deprecated

[jiangbaojun]

@tzolov Update autoconfiguration, meets the requirements of three connection methods: security key, profile, and IAM Role
DefaultCredentialsProvider.create() was deprecated, replace with DefaultCredentialsProvider.builder().build()

example configuration

spring:
  ai:
    bedrock:
      aws:
        profile:
          # (require) profile name
          name: my-profile-name
          # (optional) if not declared, use ~/.aws/credentials
          credentials-path: /develop/data/aws/credentials
          # (optional) if not declared, use ~/.aws/config
          configuration-path: /develop/data/aws/config

[ericbottard]

Hi @jiangbaojun,

Thanks for your contribution!

Could you please update this PR with related tests (likely in BedrockAwsConnectionConfigurationIT) and documentation changes?

[ericbottard]

Please use an else branch to make it clear that this is the 3rd exclusive case

[jiangbaojun]

OK, I will update later

[jiangbaojun]

Hi @ericbottard,
I had added tests and updated the documentation