Switch BuildKite to master

The SDK's master no longer works with 0.21.x.

Signed-off-by: Kazuyoshi Kato <[email protected]>

Author: kzys

.buildkite/pipeline.yml

@@ -85,7 +85,8 @@ steps:
       queue: "${BUILDKITE_AGENT_META_DATA_QUEUE:-default}"
       distro: "${BUILDKITE_AGENT_META_DATA_DISTRO}"
       hostname: "${BUILDKITE_AGENT_META_DATA_HOSTNAME}"
-
+    soft_fail:
+      - exit_status: "*"
 
   - label: ':hammer: root tests'
     commands:
@@ -98,6 +99,8 @@ steps:
       queue: "${BUILDKITE_AGENT_META_DATA_QUEUE:-default}"
       distro: "${BUILDKITE_AGENT_META_DATA_DISTRO}"
       hostname: "${BUILDKITE_AGENT_META_DATA_HOSTNAME}"
+    soft_fail:
+      - exit_status: "*"
 
   - label: ':hammer: test against firecracker master'
     env:
@@ -118,8 +121,6 @@ steps:
       queue: "${BUILDKITE_AGENT_META_DATA_QUEUE:-default}"
       distro: "${BUILDKITE_AGENT_META_DATA_DISTRO}"
       hostname: "${BUILDKITE_AGENT_META_DATA_HOSTNAME}"
-    soft_fail:
-      - exit_status: "*"
 
   - label: 'go mod tidy'
     commands: