treewide: port everything to blockdev

This gets rid of most ad-hoc block device code, using blockdev for
everything. It also gets rid of diskfs for everything but tests. This
enables Metropolis to be installed on non-512-byte block sizes.

Change-Id: I644b5b68bb7bed8106585df3179674789031687a
Reviewed-on: https://review.monogon.dev/c/monogon/+/1873
Tested-by: Jenkins CI
Reviewed-by: Serge Bazanski <serge@monogon.tech>
diff --git a/metropolis/node/build/mkimage/BUILD.bazel b/metropolis/node/build/mkimage/BUILD.bazel
index 2bf8229..2c7d699 100644
--- a/metropolis/node/build/mkimage/BUILD.bazel
+++ b/metropolis/node/build/mkimage/BUILD.bazel
@@ -5,7 +5,11 @@
     srcs = ["main.go"],
     importpath = "source.monogon.dev/metropolis/node/build/mkimage",
     visibility = ["//visibility:private"],
-    deps = ["//metropolis/node/build/mkimage/osimage"],
+    deps = [
+        "//metropolis/node/build/mkimage/osimage",
+        "//metropolis/pkg/blkio",
+        "//metropolis/pkg/blockdev",
+    ],
 )
 
 go_binary(