Run "bazel test //..." in CI

This will build all buildable targets and test all testable targets.

The hardcoded Harbormaster rules have been removed in Phabricator.

Adds a simple test for booting Smalltown.

BUILD files that are injected into repositories have been renamed to
BUILD.repo to ensure that Bazel does not recognize them as local BUILD
files and attempt to build them.

Test Plan: Covered by CI :)

Bug: T483

X-Origin-Diff: phab/D262
GitOrigin-RevId: 3512a5e13430001f4e6f91d21ac503564c8fb085
diff --git a/scripts/run_ci.sh b/scripts/run_ci.sh
index f9e0c12..e3efd27 100755
--- a/scripts/run_ci.sh
+++ b/scripts/run_ci.sh
@@ -1,5 +1,6 @@
 #!/bin/bash
-# This script is executed by our CI
+# This helper scripts executes all Bazel tests in our CI environment.
+# https://phab.monogon.dev/harbormaster/plan/2/
 set -euo pipefail
 
 BUILD_ID=$1;
@@ -52,7 +53,7 @@
     --pod ${POD} \
     --name=${POD}-bazel \
     ${TAG} \
-    $@
+    bazel test //...
 
 function conduit() {
   # Get Phabricator host from Git origin