This edge release fixes some `Instant`-related proxy panics that occur on Amazon Linux. It also includes many behind the scenes improvements to the project's CI and linting. * Removed the `--controller-image-version` install flag to simplify the way that image versions are handled. The controller image version can be set using the `--set linkerdVersion` flag or Helm value * Lowercased logs and removed redundant lines from the Linkerd2 proxy init container * Prevented the proxy from logging spurious errors when its pod does not define any container ports * Added workarounds to reduce the likelihood of `Instant`-related proxy panics that occur on Amazon Linux