Merge pull request sigstore#48 from vaikas/release-18

Remove the ARM specific release as that's no longer necessary.

Merge pull request sigstore#47 from vaikas/break-things-apart

Use the CI release version of the SQL server that has the schema

Merge pull request sigstore#46 from vaikas/trillian-db-flags

no gc, no idle conns

Merge pull request sigstore#43 from vaikas/use-public-images

Use public images for everything but ctlog (which doesn't have one afaict)

Merge pull request sigstore#40 from vaikas/allow-public-oauth-issuers

Add public oauth issuers, also add setup-kind.sh to release artifacts.

Merge pull request sigstore#37 from vaikas/unify-setup

Unify the mac/linux installation scripts, enable rekor attestation storage.