Bump to Buildah v1.27.0

As the title says.

Vendor Buildah v1.27.0 into Podman in preparation for Buildah v4.2

[No New Tests Needed]

Signed-off-by: tomsweeneyredhat <tsweeney@redhat.com>

vendor/github.com/containers/buildah/pkg/util/version_unix.go

@@ -0,0 +1,19 @@
+//go:build linux || freebsd || darwin
+// +build linux freebsd darwin
+
+package util
+
+import (
+	"bytes"
+
+	"golang.org/x/sys/unix"
+)
+
+func ReadKernelVersion() (string, error) {
+	var uname unix.Utsname
+	if err := unix.Uname(&uname); err != nil {
+		return "", err
+	}
+	n := bytes.IndexByte(uname.Release[:], 0)
+	return string(uname.Release[:n]), nil
+}