failure-injection: add disk stall failure modes

This change adds cgroup and dmsetup disk stalls to the failure
injection library. A majority of this logic is a port of the
existing disk stall implementations found in roachtestutil,
however several additions were added to make cleanup and
restore of said failures restore the system back to it's
original state.

Author: DarrylWong

Diff for: pkg/cmd/roachtest/tests/BUILD.bazel

@@ -226,6 +226,7 @@ go_library(
         "//pkg/clusterversion",
         "//pkg/cmd/cmpconn",
         "//pkg/cmd/roachprod-microbench/util",
+        "//pkg/cmd/roachprod/grafana",
         "//pkg/cmd/roachtest/cluster",
         "//pkg/cmd/roachtest/clusterstats",
         "//pkg/cmd/roachtest/grafana",

Diff for: pkg/cmd/roachtest/tests/failure_injection.go

@@ -3,6 +3,7 @@ load("@io_bazel_rules_go//go:def.bzl", "go_library")
 go_library(
     name = "failures",
     srcs = [
+        "disk_stall.go",
         "failure.go",
         "latency.go",
         "network_partition.go",
@@ -14,6 +15,8 @@ go_library(
         "//pkg/roachprod",
         "//pkg/roachprod/install",
         "//pkg/roachprod/logger",
+        "//pkg/util/retry",
+        "//pkg/util/timeutil",
         "@com_github_cockroachdb_errors//:errors",
     ],
 )