m/node/allocs: split new package off m/node

The metropolis/node package contains various unrelated things. One of
these things are node-wide allocations of identifiers.
These are moved here to the new metropolis/node/allocs package.
Additionally, the constants are renamed to move the type of identifier
in front.

Change-Id: Ibc841ca64d4450a7054463e6d2d44753a118e07a
Reviewed-on: https://review.monogon.dev/c/monogon/+/4566
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
Tested-by: Jenkins CI
diff --git a/metropolis/node/core/time/BUILD.bazel b/metropolis/node/core/time/BUILD.bazel
index f113153..3f318e0 100644
--- a/metropolis/node/core/time/BUILD.bazel
+++ b/metropolis/node/core/time/BUILD.bazel
@@ -6,7 +6,7 @@
     importpath = "source.monogon.dev/metropolis/node/core/time",
     visibility = ["//visibility:public"],
     deps = [
-        "//metropolis/node",
+        "//metropolis/node/allocs",
         "//osbase/fileargs",
         "//osbase/supervisor",
     ],
diff --git a/metropolis/node/core/time/time.go b/metropolis/node/core/time/time.go
index 23400ef..d7cd721 100644
--- a/metropolis/node/core/time/time.go
+++ b/metropolis/node/core/time/time.go
@@ -20,7 +20,7 @@
 	"strconv"
 	"strings"
 
-	"source.monogon.dev/metropolis/node"
+	"source.monogon.dev/metropolis/node/allocs"
 	"source.monogon.dev/osbase/fileargs"
 	"source.monogon.dev/osbase/supervisor"
 )
@@ -53,8 +53,8 @@
 	cmd := exec.CommandContext(ctx,
 		"/time/chrony",
 		"-d",
-		"-i", strconv.Itoa(node.TimeUid),
-		"-g", strconv.Itoa(node.TimeUid),
+		"-i", strconv.Itoa(allocs.UidTime),
+		"-g", strconv.Itoa(allocs.UidTime),
 		"-f", args.ArgPath("chrony.conf", []byte(config)),
 	)
 	cmd.Stdout = supervisor.RawLogger(ctx)