HDDS-15977. Remove mountpoint-s3

[Eason09053360]

What changes were proposed in this pull request?

Remove mountpoint-s3 and csc from the runner image. HDDS-15876 removed ozone-csi, so neither the S3 FUSE mount support nor the CSI command line client is used by anything in the project.

• Drop the MOUNTPOINT_S3_VERSION build arg and the RUN layer that downloads and installs the mount-s3 RPM.
• Drop the fuse package from the dnf install list — mountpoint-s3 was its only consumer.
• Drop the golang builder stage that installs gocsi/csc, and the COPY that puts csc into the image.

What is the link to the Apache JIRA?

https://issues.apache.org/jira/browse/HDDS-15977

How was this patch tested?

Relies on the CI image build on this PR.

[adoroszlai]

Thanks @Eason09053360 for the patch. Please enable workflows in your fork.

It looks like the task description was incomplete. We should also remove csc:

ozone-docker-runner/Dockerfile

Lines 17 to 18 in 73bdd3f

	FROM golang:1.26-bookworm AS go
	RUN go install github.com/rexray/gocsi/csc@v1.2.2

ozone-docker-runner/Dockerfile

Lines 45 to 46 in 73bdd3f

	# CSI / k8s dependency
	COPY --from=go /go/bin/csc /usr/bin/csc

[Eason09053360]

Thanks @Eason09053360 for the patch. Please enable workflows in your fork.

Thanks for reviewing ! enabled now

It looks like the task description was incomplete. We should also remove csc:

ozone-docker-runner/Dockerfile

Lines 17 to 18 in 73bdd3f

	FROM golang:1.26-bookworm AS go
	RUN go install github.com/rexray/gocsi/csc@v1.2.2

ozone-docker-runner/Dockerfile

Lines 45 to 46 in 73bdd3f

	# CSI / k8s dependency
	COPY --from=go /go/bin/csc /usr/bin/csc

Sure, I will take a look at it later :)