Upgrade to containerd to 1.7.0

We are considering making this the last release with armhf support, since it involves building a custom containerd version on a Raspberry Pi with a 32-bit OS.

Changelog for 0.16.9:

• PR #323 Update Containerd to 1.7.0 by @alexellis
• PR #321 Bump golang.org/x/net from 0.0.0-20220722155237-a158d28d115b to 0.7.0 by @dependabot[bot]
• PR #315 Removed auth plugin by @nitishkumar71

Commits
e1d90bb Update Prometheus and OpenFaaS CE gateway versions by @alexellis
6c8214b Remove single item matrix from workflow files by @alexellis
990f1a4 Update to Go 1.19 by @alexellis
c41c2cd Migrate to containerd v1.7.0 and update dependencies by @alexellis
9efd019 Update vision by @alexellis
d09ab85 Update notes in README by @alexellis
c5c0fa0 Bump golang.org/x/net from 0.0.0-20220722155237-a158d28d115b to 0.7.0 by @dependabot[bot]
aaf1811 Removed auth plugin by @nitishkumar71

Changes: 0.16.8-rc1...0.16.9

Generated by Derek