go.mod: update osbuild/images to v0.118.0

Replace ifcfg with net-lib for EL10 and F42 installers.

In RHEL 10 and Fedora 42, the ifcfg module was replaced by net-lib.

This PR removes ifcfg from common anaconda dracut stage modules and adds
either ifcfg or net-lib to each installer based on distro version.

vendor/github.com/osbuild/images/pkg/platform/riscv64.go

@@ -0,0 +1,25 @@
+package platform
+
+import (
+	"github.com/osbuild/images/pkg/arch"
+)
+
+type RISCV64 struct {
+	BasePlatform
+}
+
+func (p *RISCV64) GetArch() arch.Arch {
+	return arch.ARCH_RISCV64
+}
+
+func (p *RISCV64) GetPackages() []string {
+	packages := p.BasePlatform.FirmwarePackages
+
+	return packages
+}
+
+func (p *RISCV64) GetBuildPackages() []string {
+	var packages []string
+
+	return packages
+}