Remove `linux-arm64`, `linux-s390x` and `linux-pcc64le` groups from docker bake file

[lemeurherve]

docker/docker-bake.hcl

Lines 173 to 198 in 3fa92a5

	group "linux-arm64" {
	targets = [
	"alpine_jdk21",
	"debian_jdk17",
	"debian_jdk21",
	"debian-slim_jdk21",
	"rhel_jdk17",
	"rhel_jdk21",
	]
	}
	group "linux-s390x" {
	targets = [
	"debian_jdk17",
	"debian_jdk21",
	]
	}
	group "linux-ppc64le" {
	targets = [
	"debian_jdk17",
	"debian_jdk21",
	"rhel_jdk17",
	"rhel_jdk21",
	]
	}

Note: I think those groups should be removed (in another PR): unused, and unfortunately hardcoding various JDK versions.

Since #2155, buildarch-<arch> and listarch-<arch> can be used instead to selectively build or list specific targets of an architecture.

(Not doing it there as having them respecting the weekly/lts different JDKs would introduce unnecessary complexity)

Originally posted by @lemeurherve in #2178 (comment)