ops: use build arg to reference custom builder tag

Previously, the `latest` tag would be implicitly
always used for the `builder`. This introduces
the ability to introduce a custom tag name when
building images that bulid `FROM` the `builder`.

ops/docker/Dockerfile.batch-submitter

 ARG LOCAL_REGISTRY=docker.io
-FROM ${LOCAL_REGISTRY}/ethereumoptimism/builder AS builder
+ARG BUILDER_TAG=latest
+FROM ${LOCAL_REGISTRY}/ethereumoptimism/builder:${BUILDER_TAG} AS builder
 
 FROM node:14-alpine
 

ops/docker/Dockerfile.data-transport-layer

 ARG LOCAL_REGISTRY=docker.io
-FROM ${LOCAL_REGISTRY}/ethereumoptimism/builder AS builder
+ARG BUILDER_TAG=latest
+FROM ${LOCAL_REGISTRY}/ethereumoptimism/builder:${BUILDER_TAG} AS builder
 
 FROM node:14-alpine
 

ops/docker/Dockerfile.deployer

 ARG LOCAL_REGISTRY=docker.io
-FROM ${LOCAL_REGISTRY}/ethereumoptimism/builder AS builder
+ARG BUILDER_TAG=latest
+FROM ${LOCAL_REGISTRY}/ethereumoptimism/builder:${BUILDER_TAG} AS builder
 
 FROM node:14-alpine
 

ops/docker/Dockerfile.integration-tests

 ARG LOCAL_REGISTRY=docker.io
-FROM ${LOCAL_REGISTRY}/ethereumoptimism/builder AS builder
+ARG BUILDER_TAG=latest
+FROM ${LOCAL_REGISTRY}/ethereumoptimism/builder:${BUILDER_TAG} AS builder
 
 FROM node:14-alpine
 

ops/docker/Dockerfile.message-relayer

 ARG LOCAL_REGISTRY=docker.io
-FROM ${LOCAL_REGISTRY}/ethereumoptimism/builder AS builder
+ARG BUILDER_TAG=latest
+FROM ${LOCAL_REGISTRY}/ethereumoptimism/builder:${BUILDER_TAG} AS builder
 
 FROM node:14-alpine
 

ops/docker/Dockerfile.regenesis-surgery

-FROM ethereumoptimism/builder AS builder
+ARG LOCAL_REGISTRY=docker.io
+ARG BUILDER_TAG=latest
+FROM ${LOCAL_REGISTRY}/ethereumoptimism/builder:${BUILDER_TAG} AS builder
 
 FROM node:14-alpine
 

ops/docker/Dockerfile.replica-healthcheck

-FROM ethereumoptimism/builder AS builder
+ARG LOCAL_REGISTRY=docker.io
+ARG BUILDER_TAG=latest
+FROM ${LOCAL_REGISTRY}/ethereumoptimism/builder:${BUILDER_TAG} AS builder
 
 FROM node:14-alpine
 

ops/docker/Dockerfile.rpc-proxy

 FROM openresty/openresty:buster
-LABEL maintainer="Optimistic Systems <systems@optiomism.io>"
+LABEL maintainer="Optimistic Systems <systems@optimism.io>"
 ARG GOTEMPLATE_VERSION=v3.9.0
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get update \