[go1.25] Add UBI10 calico/base images

[hjiawei]

Pick #745 into the go1.25 release branch.

[Copilot]

Pull request overview

This PR adds support for UBI10 (Universal Base Image 10) to the calico/base images by refactoring the build process to handle multiple UBI versions through parameterization rather than separate build targets.

Key changes:

• Parameterized the main Dockerfile to accept a UBI_VERSION build argument for flexible UBI version selection
• Refactored the Makefile to use a pattern rule that dynamically builds images for ubi8, ubi9, and ubi10
• Simplified the CD process by using a loop over UBI versions instead of hardcoded commands

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
images/calico-base/Dockerfile	Added UBI_VERSION ARG and parameterized the base image reference to support multiple UBI versions
images/Makefile	Refactored build targets to use pattern rules and loops for building/pushing multiple UBI versions (ubi8, ubi9, ubi10)

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[Copilot]

The build argument UBI_VERSION=$* is being passed for all UBI versions, including ubi8. However, Dockerfile.ubi8 doesn't declare an ARG UBI_VERSION parameter, which means this build argument will be ignored for ubi8 builds. While this won't cause a build failure, it creates an inconsistency in the build arguments between different UBI versions.

Consider either:

1. Adding ARG UBI_VERSION to Dockerfile.ubi8 (even if unused), or
2. Conditionally passing the UBI_VERSION build arg only for ubi9 and ubi10

Suggested change

	$(DOCKER_BUILD) --build-arg LDSONAME=$(LDSONAME) --build-arg=UBI_VERSION=$* -t $(CALICO_BASE):$*-latest-$(ARCH) -f calico-base/$(DOCKERFILE) calico-base/
	$(if $(filter ubi8,$*), \
	$(DOCKER_BUILD) --build-arg LDSONAME=$(LDSONAME) -t $(CALICO_BASE):$*-latest-$(ARCH) -f calico-base/$(DOCKERFILE) calico-base/, \
	$(DOCKER_BUILD) --build-arg LDSONAME=$(LDSONAME) --build-arg=UBI_VERSION=$* -t $(CALICO_BASE):$*-latest-$(ARCH) -f calico-base/$(DOCKERFILE) calico-base/ \
	)