GitLab

Remove some flaky scenarios, and switch to chat for better reliability

* tests: add single threaded history test

Also tidies up some existing tests to handle more model output variation

* test: add support for testing specific architectures

usage example:
  go test --tags=integration,perf -count 1 ./integration -v -timeout 1h -run TestModelsPerf 2>&1 | tee int.log
  cat int.log | grep MODEL_PERF_HEADER | cut -f2- -d: > perf.csv
  cat int.log | grep MODEL_PERF_DATA | cut -f2- -d: >> perf.csv