minio: Add Docker registry mirror support via Kconfig

Enable MinIO to automatically use the local Docker registry mirror when
KDEVOPS_DOCKER_MIRROR is enabled, following the same pattern established
for vLLM. This provides faster container image pulls and offline operation
support for MinIO S3 storage benchmarking workflows.

The container image URL is automatically prefixed with localhost:5000 when
the docker mirror is detected, eliminating the need for runtime Ansible
variable manipulation.

Generated-by: Claude AI
Signed-off-by: Luis Chamberlain <[email protected]>

Author: mcgrof

workflows/minio/Kconfig.docker

@@ -1,11 +1,15 @@
 config MINIO_CONTAINER_IMAGE_STRING
 	string "MinIO container image"
 	output yaml
+	default "localhost:5000/minio/minio:RELEASE.2024-01-16T16-07-38Z" if KDEVOPS_DOCKER_MIRROR
 	default "minio/minio:RELEASE.2024-01-16T16-07-38Z"
 	help
 	The MinIO container image to use for S3 storage benchmarking.
 	Using a recent stable release with performance improvements.
 
+	When KDEVOPS_DOCKER_MIRROR is enabled, the image URL is automatically
+	prefixed with the local registry address for faster pulls.
+
 config MINIO_CONTAINER_NAME
 	string "The local MinIO container name"
 	default "minio-warp-server"