e2e_tests: Add a tool to dev_container and guest rootfs

Add a tool used in vsock tests to dev_container and guest rootfs

BUG=b:254375643
TEST=`./tools/presubmit` with the new guest rootfs on the new
dev_container

Change-Id: I135e6d2d413bedffef0fd69edd4ab14080429e3a
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3974349
Reviewed-by: Dennis Kempin <denniskempin@google.com>
Reviewed-by: Takaya Saeki <takayas@chromium.org>
Commit-Queue: Ryuichiro Chiba <chibar@chromium.org>
Reviewed-by: Keiichi Watanabe <keiichiw@chromium.org>

e2e_tests/README.md

@@ -20,7 +20,8 @@ Note: Only Googlers with access to the crosvm-testing cloud storage bin can uplo
 To upload the modified rootfs, you will have to uprev the `PREBUILT_VERSION` variable in:
 
 - `./guest_under_test/PREBUILT_VERSION`
-- `src/third_party/chromiumos-overlay/chromeos-base/crosvm/crosvm-9999.ebuild`
 
-Then run the upload script to build and upload the new prebuilts. **Never** try to modify an
-existing prebuilt as the new images may break tests in older versions.
+and [request a permission](http://go/crosvm/infra.md?cl=head#access-on-demand-to-upload-artifacts)
+to become a member of the `crosvm-policy-uploader` group. Then run the upload script to build and
+upload the new prebuilts. **Never** try to modify an existing prebuilt as the new images may break
+tests in older versions.

e2e_tests/guest_under_test/Dockerfile

@@ -2,9 +2,9 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 ARG ARCH
-FROM ${ARCH}/alpine:3.12
+FROM ${ARCH}/alpine:3.16
 
-RUN apk add --no-cache pciutils
+RUN apk add --no-cache pciutils nmap-ncat
 
 # Note: This docker file is run from the $(target)/rootfs directory specified in
 #       the Makefile.

e2e_tests/guest_under_test/PREBUILT_VERSION

@@ -1 +1 @@
-r0001
+r0002

tools/impl/dev_container/entrypoint.sh

@@ -11,6 +11,11 @@ if [ -e "/dev/kvm" ]; then
     chmod 666 /dev/kvm
 fi
 
+# Give a vhost device correct permission
+if [ -e "/dev/vhost-vsock" ]; then
+    chmod 666 /dev/vhost-vsock
+fi
+
 # Run provided command or interactive shell
 if [[ $# -eq 0 ]]; then
     sudo -u crosvmdev /bin/bash -l

tools/impl/dev_container/version

@@ -1 +1 @@
-r0030
+r0031

tools/install-deps

@@ -34,6 +34,7 @@ sudo apt-get install --yes --no-install-recommends \
     make \
     mold \
     nasm \
+    ncat \
     ninja-build \
     openssh-client \
     pkg-config \