chore(e2e): Add source override to admin ui build script

* override build source for automation. Allowing enterprise builds from boundary-ui source

scripts/build-ui.sh

@@ -14,8 +14,17 @@ if [ -z "$UI_VERSION_FILE" ]; then
 fi
 
 UI_EDITION=$(make --no-print-directory edition)
+# allow override for the source of ui files
+# used by end-to-end tests to build enterprise edition from community files
+# UI_SRC_OVERRIDE will override which edition is pulled
+# but UI_EDITION_SRC will still determine the build version
+if [ -n "$UI_SRC_OVERRIDE" ]; then
+  UI_SRC=$UI_SRC_OVERRIDE
+else
+  UI_SRC=$UI_EDITION
+fi
 
-if [ "$UI_EDITION" == "oss" ]; then
+if [ $UI_SRC == "oss" ]; then
   UI_REPO=https://github.com/hashicorp/boundary-ui
   REPO_NAME=boundary-ui
 else
@@ -37,12 +46,12 @@ if which gh &> /dev/null;  then
     echo "Found gh cli, attempting to download ui assets"
 
     artifact_id=$(gh api "repos/hashicorp/${REPO_NAME}/actions/artifacts" --paginate | \
-        jq ".artifacts[] | select(.workflow_run.head_sha == \"${UI_COMMITISH}f\" and .name == \"admin-ui-${UI_EDITION}\")" | \
+        jq ".artifacts[] | select(.workflow_run.head_sha == \"${UI_COMMITISH}f\" and .name == \"admin-ui-${UI_SRC}\")" | \
         jq --slurp '.[0]' | \
         jq -r '.id')
 
     if [[ "${artifact_id}" != "null" ]]; then
-        echo "Downloading artifact: ${artifact_id} for admin-ui-${UI_EDITION} ${UI_COMMITISH}"
+        echo "Downloading artifact: ${artifact_id} for admin-ui-${UI_SRC} ${UI_COMMITISH}"
         tmp_dir=$(mktemp -d)
         gh api "repos/hashicorp/${REPO_NAME}/actions/artifacts/${artifact_id}/zip" > "${tmp_dir}/boundary-ui.zip"
         trap 'rm -rf ${tmp_dir}' EXIT
@@ -54,7 +63,7 @@ if which gh &> /dev/null;  then
         unzip "${tmp_dir}/boundary-ui.zip" -d "${UI_CLONE_DIR}/ui/admin/dist"
         exit $?
     else
-        echo "could not find artifact: admin-ui-${UI_EDITION} ${UI_COMMITISH}, falling back to git clone"
+        echo "could not find artifact: admin-ui-${UI_SRC} ${UI_COMMITISH}, falling back to git clone"
     fi
 fi