infra: Always docker pull dev container in CQ

The overhead for doing this is small as docker will not pull when
digest doesn't change.

TEST=https://luci-milo.appspot.com/swarming/task/5d5206115a9d7811
FIXED=b:243562713

Change-Id: I4158e433a62f6e7815edaec180b1b294d9ff4d79
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3885378
Reviewed-by: Dennis Kempin <denniskempin@google.com>
Commit-Queue: Zihan Chen <zihanchen@google.com>

infra/recipe_modules/crosvm/api.py

@@ -268,6 +268,14 @@ class CrosvmApi(recipe_api.RecipeApi):
                         "--stop",
                     ],
                 )
+                self.m.step(
+                    "Force pull dev_container",
+                    [
+                        "vpython3",
+                        self.source_dir.join("tools/dev_container"),
+                        "--pull",
+                    ],
+                )
                 self.m.crosvm.step_in_container("Ensure dev container exists", ["true"])
 
     def __set_git_config(self, prop, value):

infra/recipe_modules/crosvm/examples/container_build_context.expected/basic.json

@@ -233,6 +233,19 @@
       "@@@STEP_NEST_LEVEL@2@@@"
     ]
   },
+  {
+    "cmd": [
+      "vpython3",
+      "[CACHE]/builder/crosvm/tools/dev_container",
+      "--pull"
+    ],
+    "cwd": "[CACHE]/builder/crosvm",
+    "infra_step": true,
+    "name": "Prepare Container Build.Prepare dev_container.Force pull dev_container",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
   {
     "cmd": [
       "vpython3",

infra/recipes/build_linux.expected/build_x86_64_coverage.json

@@ -355,6 +355,31 @@
       "@@@STEP_NEST_LEVEL@2@@@"
     ]
   },
+  {
+    "cmd": [
+      "vpython3",
+      "[CACHE]/builder/crosvm/tools/dev_container",
+      "--pull"
+    ],
+    "cwd": "[CACHE]/builder/crosvm",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "crosvm/crosvm:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Prepare Container Build.Prepare dev_container.Force pull dev_container",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
   {
     "cmd": [
       "vpython3",