stateify: support explicit annotation mode; convert refs and stack packages.

We have been unnecessarily creating too many savable types implicitly.

PiperOrigin-RevId: 206334201
Change-Id: Idc5a3a14bfb7ee125c4f2bb2b1c53164e46f29a8

pkg/abi/BUILD

@@ -1,7 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library")
-load("//tools/go_stateify:defs.bzl", "go_stateify")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_stateify")
 
 go_stateify(
     name = "abi_state",

pkg/abi/linux/BUILD

@@ -4,8 +4,7 @@
 
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library")
-load("//tools/go_stateify:defs.bzl", "go_stateify")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_stateify")
 
 go_stateify(
     name = "linux_state",

pkg/amutex/BUILD

@@ -1,6 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
 
 go_library(
     name = "amutex",

pkg/atomicbitops/BUILD

@@ -1,6 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
 
 go_library(
     name = "atomicbitops",

pkg/binary/BUILD

@@ -1,6 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
 
 go_library(
     name = "binary",

pkg/bits/BUILD

@@ -1,6 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
 load("//tools/go_generics:defs.bzl", "go_template", "go_template_instance")
 
 go_library(

pkg/bpf/BUILD

@@ -1,7 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
-load("//tools/go_stateify:defs.bzl", "go_stateify")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_stateify", "go_test")
 
 go_stateify(
     name = "bpf_state",

pkg/compressio/BUILD

@@ -1,6 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
 
 go_library(
     name = "compressio",

pkg/control/client/BUILD

@@ -1,6 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library")
+load("//tools/go_stateify:defs.bzl", "go_library")
 
 go_library(
     name = "client",

pkg/control/server/BUILD

@@ -1,6 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library")
+load("//tools/go_stateify:defs.bzl", "go_library")
 
 go_library(
     name = "server",

pkg/cpuid/BUILD

@@ -1,7 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
-load("//tools/go_stateify:defs.bzl", "go_stateify")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_stateify", "go_test")
 
 go_stateify(
     name = "cpuid_state",

pkg/dhcp/BUILD

@@ -1,6 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
 
 go_library(
     name = "dhcp",

pkg/eventchannel/BUILD

@@ -1,7 +1,7 @@
 package(licenses = ["notice"])  # Apache 2.0
 
+load("//tools/go_stateify:defs.bzl", "go_library")
 load("@io_bazel_rules_go//proto:def.bzl", "go_proto_library")
-load("@io_bazel_rules_go//go:def.bzl", "go_library")
 
 go_library(
     name = "eventchannel",

pkg/fd/BUILD

@@ -1,6 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
 
 go_library(
     name = "fd",

pkg/gate/BUILD

@@ -1,6 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
 
 go_library(
     name = "gate",

pkg/hashio/BUILD

@@ -1,6 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
 
 go_library(
     name = "hashio",

pkg/ilist/BUILD

@@ -1,8 +1,7 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
 load("//tools/go_generics:defs.bzl", "go_template", "go_template_instance")
-load("//tools/go_stateify:defs.bzl", "go_stateify")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_stateify", "go_test")
 
 go_stateify(
     name = "list_state",

pkg/linewriter/BUILD

@@ -1,6 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
 
 go_library(
     name = "linewriter",

pkg/log/BUILD

@@ -1,6 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
 
 go_library(
     name = "log",

pkg/metric/BUILD

@@ -1,7 +1,7 @@
 package(licenses = ["notice"])  # Apache 2.0
 
+load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
 load("@io_bazel_rules_go//proto:def.bzl", "go_proto_library")
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
 
 go_library(
     name = "metric",