App Framework: AWS S3 region extraction logic does not handle us-gov-west-1

[chancepants]

Please select the type of request

Bug

Tell us more

Describe the request
Update the awss3client to support us-gov-west-1. The region regex expects regions with 3 parts e.g. us-west-2 and fails to parse regions with 4 parts us-gov-west-1 https://github.com/splunk/splunk-operator/blob/main/pkg/splunk/client/awss3client.go#L64

Expected behavior
The app framework behaviors work as intended in us-gov-west-1

Splunk setup on K8S
A cluster configured with app repo endpoint: https://s3.us-gov-west-1.amazonaws.com

Reproduction/Testing steps
Attempt to install an app using a repo in us-gov-west-1

K8s environment
EKS version 1.28

[chancepants]

I believe the existing regex will not work for China either as the domain ends in .cn https://docs.amazonaws.cn/en_us/aws/latest/userguide/endpoints-arns.html

[chancepants]

looks like region is a supported volume param since 2.0 which will work around the issue.