Remove cargo-chef and buildx cache

[Kailai-Wang]

Context

After several's months' run the cargo-chef and buildx cache (from #409), it doesn't seem to be very effective - our CI-runner needs ~20 min anyway to run a docker build with release profile.

Additionally, cargo-chef seems to remove the inherits from the production profile which caused problems:

error: profile `production` is missing an `inherits` directive (`inherits` is required for all profiles except `dev` or `release`)

Task

Remove use of cargo-chef

Acceptance criteria

cargo-chef is removed and CI doesn't break

If we found better ways for caching within docker, we can adjust it later (or even add back cargo-chef if it's improved)

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