ci: speed up CI by up to 50% (#11794)

Introduces a number of improvements to CI that significantly
reduce overal CI time by up to 50% of the previous time.

packages/contracts-bedrock/justfile

@@ -79,6 +79,11 @@ snapshots-no-build: snapshots-abi-storage
 # Builds contracts and then generates core snapshots.
 snapshots: build snapshots-no-build
 
+# Checks if the snapshots are up to date without building.
+snapshots-check-no-build:
+  ./scripts/checks/check-snapshots.sh --no-build
+
+# Checks if the snapshots are up to date.
 snapshots-check:
   ./scripts/checks/check-snapshots.sh
 

packages/contracts-bedrock/scripts/checks/check-snapshots.sh

 #!/usr/bin/env bash
 set -euo pipefail
 
-# Generate the snapshots
-just snapshots
+# Check for the --no-build flag
+# Generate snapshots
+if [ "$1" == "--no-build" ]; then
+    just snapshots-no-build
+else
+    just snapshots
+fi
 
 # Check if the generated `snapshots` files are different from the committed versions
 if git diff --exit-code snapshots > /dev/null; then