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/uptime_darwin.go

@@ -0,0 +1,10 @@
+package util
+
+import (
+	"errors"
+	"time"
+)
+
+func ReadUptime() (time.Duration, error) {
+	return 0, errors.New("readUptime not supported on darwin")
+}