feat(ci): download and cache solidity compilers (#2767)

Downloads and caches the Solidity compilers to avoid CI errors where
circle seems to be getting rate limited. Checks compilers against known
hashes to guarantee that we're not getting any sort of error during this
caching step.
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

.changeset/heavy-sheep-dream.md

+---
+'@eth-optimism/js-builder': patch
+---
+
+Cache Solc 0.8.9 and 0.8.10 for use in CI

ops/docker/js-builder/Dockerfile

@@ -18,4 +18,27 @@ RUN apt-get update && \
 	apt-get install -y nodejs && \
 	npm i -g yarn && \
 	npm i -g depcheck && \
-	pip install slither-analyzer
+	pip install slither-analyzer
\ No newline at end of file
+
+RUN echo "caching solidity compiler versions" && \
+  curl -sL https://binaries.soliditylang.org/linux-amd64/solc-linux-amd64-v0.5.17+commit.d19bba13 && \
+  curl -sL https://binaries.soliditylang.org/linux-amd64/solc-linux-amd64-v0.8.9+commit.e5eed63a  && \
+  curl -sL https://binaries.soliditylang.org/linux-amd64/solc-linux-amd64-v0.8.10+commit.fc410830 && \
+  curl -sL https://binaries.soliditylang.org/linux-amd64/solc-linux-amd64-v0.8.12+commit.f00d7308 && \
+  echo "c35ce7a4d3ffa5747c178b1e24c8541b2e5d8a82c1db3719eb4433a1f19e16f3 solc-linux-amd64-v0.5.17+commit.d19bba13" | sha256sum --check --status - || exit 1 \
+  echo "f851f11fad37496baabaf8d6cb5c057ca0d9754fddb7a351ab580d7fd728cb94 solc-linux-amd64-v0.8.9+commit.e5eed63a"  | sha256sum --check --status - || exit 1 \
+  echo "c7effacf28b9d64495f81b75228fbf4266ac0ec87e8f1adc489ddd8a4dd06d89 solc-linux-amd64-v0.8.10+commit.fc410830" | sha256sum --check --status - || exit 1 \
+  echo "556c3ec44faf8ff6b67933fa8a8a403abe82c978d6e581dbfec4bd07360bfbf3 solc-linux-amd64-v0.8.12+commit.f00d7308" | sha256sum --check --status - || exit 1 \
+  mkdir -p ~/.cache/hardhat-nodejs/compilers/linux-amd64 && \
+  cp solc-linux-amd64-v0.5.17+commit.d19bba13 ~/.cache/hardhat-nodejs/compilers/linux-amd64/ && \
+  cp solc-linux-amd64-v0.8.9+commit.e5eed63a  ~/.cache/hardhat-nodejs/compilers/linux-amd64/ && \
+  cp solc-linux-amd64-v0.8.10+commit.fc410830 ~/.cache/hardhat-nodejs/compilers/linux-amd64/ && \
+  cp solc-linux-amd64-v0.8.12+commit.f00d7308 ~/.cache/hardhat-nodejs/compilers/linux-amd64/ && \
+  mkdir -p ~/.svm/0.5.17 && \
+  cp solc-linux-amd64-v0.5.17+commit.d19bba13 ~/.svm/0.5.17/solc-0.5.17 && \
+  mkdir -p ~/.svm/0.8.9  && \
+  cp solc-linux-amd64-v0.8.9+commit.e5eed63a  ~/.svm/0.8.9/solc-0.8.9   && \
+  mkdir -p ~/.svm/0.8.10 && \
+  cp solc-linux-amd64-v0.8.10+commit.fc410830 ~/.svm/0.8.10/solc-0.8.10 && \
+  mkdir -p ~/.svm/0.8.12 && \
+  cp solc-linux-amd64-v0.8.12+commit.f00d7308 ~/.svm/0.8.12/solc-0.8.12