fix(ci): export FORK_API_KEY from setup_env (#3512)

Please provide a paragraph or two giving a summary of the change,
including relevant motivation and context.

# Checklist:
Remove the checklist to signal you've completed it. Enable auto-merge if
the PR is ready to merge.
- [ ] If the pull request requires a cryptography review (e.g.
cryptographic algorithm implementations) I have added the 'crypto' tag.
- [ ] I have reviewed my diff in github, line by line and removed
unexpected formatting changes, testing logs, or commented-out code.
- [ ] Every change is related to the PR description.
- [ ] I have
[linked](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue)
this pull request to relevant issues (if any exist).

build-system/scripts/setup_env

@@ -82,6 +82,7 @@ echo export DEPLOY_TAG=$DEPLOY_TAG >> $BASH_ENV
 echo export BRANCH=$BRANCH >> $BASH_ENV
 echo export PULL_REQUEST=$PULL_REQUEST >> $BASH_ENV
 echo export DRY_DEPLOY=${DRY_DEPLOY:-0} >> $BASH_ENV
+echo export FORK_API_KEY=${FORK_API_KEY:-} >> $BASH_ENV
 # We want very strict failures on any failing command, undefined variable, or commands that pipe to other commands.
 echo set -euo pipefail >> $BASH_ENV
 # Enable logging if [ci debug] is in commit message.

l1-contracts/scripts/ci_deploy_contracts.sh

@@ -2,7 +2,7 @@
 
 FORCE_DEPLOY=${2:-"false"}
 
-export ETHEREUM_HOST=$DEPLOY_TAG-mainnet-fork.aztec.network:8545/$API_KEY
+export ETHEREUM_HOST=$DEPLOY_TAG-mainnet-fork.aztec.network:8545/$FORK_API_KEY
 
 # If we have previously successful commit, we can early out if nothing relevant has changed since.
 if [[ $FORCE_DEPLOY == 'false' ]] && check_rebuild cache-"$CONTENT_HASH" $REPOSITORY; then