Support for IAM Roles for Service Accounts (IRSA)

I've encountered this when using IRSA
```
java.lang.RuntimeException: com.amazonaws.SdkClientException: Unable to load AWS credentials from any provider in the chain: [
...
WebIdentityTokenCredentialsProvider: To use assume role profiles the aws-java-sdk-sts module must be on the class path.
...
]
```

IRSA uses WebIdentityTokenCredentialsProvider, so probably aws-java-sdk-sts is needed in pom.xml.

Inspect pom.xml and the dependency setup related to WebIdentityTokenCredentialsProvider. Confirm whether aws-java-sdk-sts is absent, then use the project's existing build or verification process to check the IRSA credential path; done means IRSA no longer reports the missing STS module.

Written by the indexing model from the issue text.