syz-cluster: add pkg/osutil to Docker containers

It's become necessary after #6533.

Author: a-nogikh

syz-cluster/controller/Dockerfile

@@ -7,6 +7,7 @@ COPY go.mod ./
 COPY go.sum ./
 RUN go mod download
 COPY pkg/gcs/ pkg/gcs/
+COPY pkg/osutil/ pkg/osutil/
 
 # Build the tool.
 COPY syz-cluster/controller/ syz-cluster/controller/

syz-cluster/dashboard/Dockerfile

@@ -7,6 +7,7 @@ COPY go.mod ./
 COPY go.sum ./
 RUN go mod download
 COPY pkg/gcs/ pkg/gcs/
+COPY pkg/osutil/ pkg/osutil/
 COPY pkg/html/urlutil/ pkg/html/urlutil/
 
 # Build the tool.

syz-cluster/reporter-server/Dockerfile

@@ -7,6 +7,7 @@ COPY go.mod ./
 COPY go.sum ./
 RUN go mod download
 COPY pkg/gcs/ pkg/gcs/
+COPY pkg/osutil/ pkg/osutil/
 
 # Build the tool.
 COPY syz-cluster/reporter-server/ syz-cluster/reporter-server/

syz-cluster/tools/db-mgmt/Dockerfile

@@ -7,6 +7,7 @@ COPY go.mod ./
 COPY go.sum ./
 RUN go mod download
 COPY pkg/gcs/ pkg/gcs/
+COPY pkg/osutil/ pkg/osutil/
 
 # Build the tool.
 COPY syz-cluster/tools/db-mgmt/*.go syz-cluster/tools/db-mgmt/