Implement async build creation process

[ghengeveld]

This updates the CLI to use the new three-step build creation process: announceBuild ➡️ publishBuild ➡️ verifyBuild

Also this adds mergeCommit to the build info.

Relies on https://github.com/chromaui/chromatic/pull/6005
and https://github.com/chromaui/chromatic/pull/6162

[linear]

CH-1759 Update CLI to use new build creation API

Introduce new "initialize build" step.

Deal with partial build data.

Drop "retryable" build mechanism.

[ghengeveld]

Published as chromatic@canary for testing.

[tmeasday]

Seems great!

[ghengeveld]

I'm calling this done but holding off the merge until we ship the backend changes.

[tmeasday]

@ghengeveld I tested this on a git repo with no origin setup and it errored with:

Field "slug" of required type "String!" was not provided.

[ghengeveld]

@ghengeveld I tested this on a git repo with no origin setup and it errored with:

Field "slug" of required type "String!" was not provided.

Opened a PR to address this here: https://github.com/chromaui/chromatic/pull/6162