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/cli/metroctl/core/BUILD.bazel b/metropolis/cli/metroctl/core/BUILD.bazel
index 133ff2e..7c1a0f4 100644
--- a/metropolis/cli/metroctl/core/BUILD.bazel
+++ b/metropolis/cli/metroctl/core/BUILD.bazel
@@ -14,11 +14,10 @@
         "//metropolis/node",
         "//metropolis/node/core/rpc",
         "//metropolis/node/core/rpc/resolver",
+        "//metropolis/pkg/blockdev",
+        "//metropolis/pkg/fat32",
+        "//metropolis/pkg/gpt",
         "//metropolis/proto/api",
-        "@com_github_diskfs_go_diskfs//:go-diskfs",
-        "@com_github_diskfs_go_diskfs//disk",
-        "@com_github_diskfs_go_diskfs//filesystem",
-        "@com_github_diskfs_go_diskfs//partition/gpt",
         "@io_k8s_client_go//pkg/apis/clientauthentication/v1:clientauthentication",
         "@io_k8s_client_go//tools/clientcmd",
         "@io_k8s_client_go//tools/clientcmd/api",