Add verbosse to sg lint when BUILKDKITE_RETRY > 0

Created by: burmudar

Currently when we retry a buildkite lint step we don't get any extra information and typically would require us to commit to the pipeline to add a -v.

Buildkite adds the env var BUILDKITE_RETRYwhen it retries a step. We can check for this env var before running the sg lint and add -v to the command.

see operations.go