ci: updates version of bash in ci-builder (#3007)

Also deletes leftover copies of solc in the
root of the image. They are copied to the places
where they are expected.

.changeset/slow-peaches-sit.md

+---
+'@eth-optimism/ci-builder': patch
+---
+
+Install new version of bash

ops/docker/ci-builder/Dockerfile

@@ -13,7 +13,7 @@ COPY --from=geth /usr/local/bin/abigen /usr/local/bin/abigen
 COPY check-changed.sh /usr/local/bin/check-changed
 
 RUN apt-get update && \
-  apt-get install -y curl openssh-client git build-essential ca-certificates jq musl && \
+  apt-get install -y bash curl openssh-client git build-essential ca-certificates jq musl && \
   curl -sL https://deb.nodesource.com/setup_16.x -o nodesource_setup.sh && \
   curl -sL https://go.dev/dl/go1.18.2.linux-amd64.tar.gz -o go1.18.2.linux-amd64.tar.gz && \
   tar -C /usr/local/ -xzvf go1.18.2.linux-amd64.tar.gz && \
@@ -51,4 +51,8 @@ RUN echo "downloading solidity compilers" && \
   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
+  cp solc-linux-amd64-v0.8.12+commit.f00d7308 ~/.svm/0.8.12/solc-0.8.12 && \
+  rm solc-linux-amd64-v0.5.17+commit.d19bba13 && \
+  rm solc-linux-amd64-v0.8.9+commit.e5eed63a && \
+  rm solc-linux-amd64-v0.8.10+commit.fc410830 && \
+  rm solc-linux-amd64-v0.8.12+commit.f00d7308