Remove armhf/armv7 support from faasd and upgrade to containerd v1.7.18

Changelog for 0.19.0:

• PR #361 Bump golang.org/x/net from 0.22.0 to 0.23.0 by @dependabot[bot]

See notes at: #364

Commits
e4848cd Remove armhf/armv7 support from faasd by @alexellis
7dbaeef Return error from proxy by @alexellis
887c18b Close connection if unable to dial upstream by @alexellis
f6167e7 Bump golang.org/x/net from 0.22.0 to 0.23.0 by @dependabot[bot]

Changes: 0.18.8...0.19.0

Generated by Derek