Initial pass on Antithesis testing

This adds a "limbo_stress" tool for stress testing Limbo in
non-deterministic way together with support code to run the tests under
Antithesis (which makes them deterministic). The stress tester does not
really do anything useful yet, this is just a step to make sure we can
run tests under Antithesis.

scripts/antithesis/launch.sh

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+#!/bin/sh
+
+curl --fail -u "$ANTITHESIS_USER:$ANTITHESIS_PASSWD" \
+  -X POST https://$ANTITHESIS_TENANT.antithesis.com/api/v1/launch/basic_test \
+  -d "{\"params\": { \"antithesis.description\":\"basic_test on main\",
+      \"antithesis.duration\":\"1\",
+      \"antithesis.config_image\":\"$ANTITHESIS_DOCKER_REPO/limbo-config:antithesis-latest\",
+      \"antithesis.images\":\"$ANTITHESIS_DOCKER_REPO/limbo-workload:antithesis-latest\",
+      \"antithesis.report.recipients\":\"$ANTITHESIS_EMAIL\"
+      } }"

scripts/antithesis/publish-config.sh

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+#!/bin/sh
+
+set -e
+
+export DOCKER_REPO_URL=$ANTITHESIS_DOCKER_REPO
+
+export IMAGE_NAME=limbo-config
+
+export DOCKER_IMAGE_VERSION=antithesis-latest
+
+export DOCKER_BUILD_ARGS="--build-arg antithesis=true"
+
+export DOCKERFILE=stress/Dockerfile.antithesis-config
+
+export DOCKER_DIR=stress
+
+cat turso.key.json | docker login -u _json_key https://$ANTITHESIS_DOCKER_HOST --password-stdin
+
+${BASH_SOURCE%/*}/publish-docker.sh

scripts/antithesis/publish-docker.sh

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+#!/bin/sh
+
+set -e
+
+if [ -z "$DOCKER_REPO_URL" ]; then
+    echo "Error: DOCKER_REPO_URL is not set."
+    exit 1
+fi
+
+if [ -z "$IMAGE_NAME" ]; then
+    echo "Error: IMAGE_NAME is not set."
+    exit 1
+fi
+
+if [ -z "$DOCKER_IMAGE_VERSION" ]; then
+    DOCKER_IMAGE_VERSION=$(git rev-parse HEAD)
+fi
+
+DOCKER_IMAGE=$DOCKER_REPO_URL/$IMAGE_NAME:$DOCKER_IMAGE_VERSION
+
+docker build -f $DOCKERFILE -t $DOCKER_IMAGE $DOCKER_BUILD_ARGS $DOCKER_DIR
+
+docker push $DOCKER_IMAGE

scripts/antithesis/publish-workload.sh

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+#!/bin/sh
+
+set -e
+
+export DOCKER_REPO_URL=$ANTITHESIS_DOCKER_REPO
+
+export IMAGE_NAME=limbo-workload
+
+export DOCKER_IMAGE_VERSION=antithesis-latest
+
+export DOCKER_BUILD_ARGS="--build-arg antithesis=true"
+
+export DOCKERFILE=Dockerfile.antithesis
+
+export DOCKER_DIR=.
+
+cat turso.key.json | docker login -u _json_key https://$ANTITHESIS_DOCKER_HOST --password-stdin
+
+${BASH_SOURCE%/*}/publish-docker.sh