ci: begin e2e migration upgrade script

This script duplicates a lot of the logic in the `migration-testing`
branch, but it's targeting the online cluster rather than a local
devnet. This is quite important to do, to ensure we exercise
functionality like the auto-restart of the statefulsets, and also the
multi-validator setup, which has surfaced bugs easily overlooked in a
simple devnet migration.

deployments/scripts/k8s-e2e-upgrade-test

@@ -0,0 +1,66 @@
+#!/usr/bin/env bash
+# Dev script to run a full chain upgrade test, to validate migrations,
+# on a cluster-hosted devnet. Designed to be run from a developer
+# workstation. Later it can be ported to CI contexts.
+
+set -euo pipefail
+
+
+PCLI_HOME="${HOME:?}/.local/share/pcli-devnet/"
+if [[ ! -d "$PCLI_HOME" ]] ; then
+    >&2 echo "ERROR: pcli home does not exist: $PCLI_HOME"
+    exit 1
+fi
+
+FROM_VERSION="${FROM_VERSION:-}"
+if [[ -z "$FROM_VERSION" ]] ; then
+    >&2 echo "ERROR: set env var 'FROM_VERSION' to the pre-upgrade Penumbra version"
+    exit 1
+fi
+
+# script expects to be in deployments/ dir
+if [[ ! -e ci.sh ]] ; then
+    >&2 echo "ERROR: script should be run from inside 'deployments/' dir"
+    exit 1
+fi
+
+
+# Create a clean network config in the cluster.
+# This is a destructive action! Will destroy any previously existing devnet.
+function deploy_fresh_devnet() {
+    >&2 echo "Creating fresh devnet..."
+    PENUMBRA_VERSION="$FROM_VERSION" ./ci.sh
+    >&2 echo "Devnet deployment complete, waiting a bit for nodes to start..."
+    sleep 30
+}
+
+
+# Confirm we can view balances on the remote network.
+# Otherwise, rest of interactive tests won't work.
+function check_pcli_balance() {
+    >&2 echo "Checking balance via pcli..."
+    # assumes that the `pcli` on path is a stable version
+    pcli --home "$PCLI_HOME" view reset || true
+    pcli --home "$PCLI_HOME" view balance
+}
+
+function delegate_to_genesis_validators() {
+    # Default genesis allo is 25k penumbra, and there are two validators,
+    # so let's delegate twice that.
+    test_delegation="75000penumbra"
+
+    >&2 echo "Delegating ${test_delegation} to genesis validators..."
+    # using OLD pcli here
+    pcli --home "$PCLI_HOME" query validator list \
+        | perl -nE '/(penumbravalid\w+)/ and say $1' \
+        | xargs -r -n1 pcli --home "$PCLI_HOME" \
+        tx delegate "$test_delegation" --to
+}
+
+function main() {
+    deploy_fresh_devnet
+    check_pcli_balance
+    delegate_to_genesis_validators
+}
+
+main