ops: Build cleanups

[mslipper]

Cleans up a bunch of configuration in ops/, in preparation for switching most of our build configuration to CircleCI. Changes include:

1. Removing the "builder image" concept in favor of a single multi-target Dockerfile. Once this goes live on CircleCI, we'll be able to leverage Docker Layer caching more effectively.
2. Fixes the nightly build, which is currently failing on the legacy batch submitter.
3. Removes the legacy rpc-proxy since it isn't used anywhere anymore.
4. Re-enables CODEOWNERS.
5. Removes the docker-compose-nobuild.yml file, since the main docker-compose.yml file now supports images and builds.

Meta:

• Fixes ENG-1838

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Latest commit: 0fb3050

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[codecov-commenter]

Codecov Report

Merging #2283 (0fb3050) into develop (67146ed) will increase coverage by 16.07%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           develop    #2283       +/-   ##
============================================
+ Coverage    80.08%   96.15%   +16.07%     
============================================
  Files           77       51       -26     
  Lines         2460     1508      -952     
  Branches       450      229      -221     
============================================
- Hits          1970     1450      -520     
+ Misses         490       58      -432     

Flag	Coverage Δ
contracts	99.29% <ø> (ø)
core-utils	86.77% <ø> (ø)
data-transport-layer	?
sdk	?

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Impacted Files	Coverage Δ
packages/sdk/src/utils/index.ts
packages/sdk/src/interfaces/types.ts
packages/sdk/src/utils/chain-constants.ts
...ices/l1-ingestion/handlers/transaction-enqueued.ts
packages/sdk/src/adapters/dai-bridge.ts
packages/sdk/src/interfaces/index.ts
packages/sdk/hardhat.config.ts
...ckages/data-transport-layer/src/utils/contracts.ts
packages/sdk/src/cross-chain-messenger.ts
packages/sdk/src/utils/message-encoding.ts
... and 16 more

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[tynes]

Since the builder is being removed, the concept of builder can be taken out of ops/scripts/ci-versions.js

[tynes]

Can confirm that a simple docker-compose build works for building the images. We should make sure that the docs are updated accordingly

[mslipper]

Cool! Updated to fix ci-versions.js.

[tynes]

Also confirming that docker-compose pull works