[CI] Avoid reading secret from vault in steps testing packages - local stacks (#16622)

Author: mrodm

.buildkite/hooks/pre-command

@@ -110,11 +110,6 @@ if [[ "${BUILDKITE_PIPELINE_SLUG}" =~ ^(integrations|integrations-test-stack)$ ]
  BUILDKITE_API_TOKEN=$(retry 5 vault kv get -field buildkite_token "${BUILDKITE_API_TOKEN_PATH}")
  export BUILDKITE_API_TOKEN
  fi
-
- if [[ "${BUILDKITE_STEP_KEY}" =~ ^test-integrations- ]]; then
- BUILDKITE_API_TOKEN=$(retry 5 vault kv get -field buildkite_token "${BUILDKITE_API_TOKEN_PATH}")
- export BUILDKITE_API_TOKEN
- fi
 fi
 
 if [[ "${BUILDKITE_PIPELINE_SLUG}" == "integrations-serverless" ]]; then