ci: Skip expensive fp e2e tests in main workflow (#12780)

Co-authored-by: Matthew Slipper <me@matthewslipper.com>

.circleci/config.yml

@@ -897,6 +897,10 @@ jobs:
         description: Machine resource class
         type: string
         default: ethereum-optimism/latitude-1
+      skip_slow_tests:
+        description: Indicates that slow tests should be skipped
+        type: boolean
+        default: false
     machine: true
     resource_class: <<parameters.resource_class>>
     steps:
@@ -925,6 +929,7 @@ jobs:
             # need to explicitly set it here to prevent Cannon from running when we don't
             # want it to.
             export OP_E2E_CANNON_ENABLED="false"
+            export OP_E2E_SKIP_SLOW_TEST=<<parameters.skip_slow_tests>>
             # Note: We don't use circle CI test splits because we need to split by test name, not by package. There is an additional
             # constraint that gotestsum does not currently (nor likely will) accept files from different packages when building.
             JUNIT_FILE=../tmp/test-results/<<parameters.module>>_<<parameters.target>>.xml JSON_LOG_FILE=../tmp/testlogs/test.log make <<parameters.target>>
@@ -1362,6 +1367,7 @@ workflows:
           name: op-e2e-fault-proof-tests
           module: op-e2e
           target: test-fault-proofs
+          skip_slow_tests: true
           requires:
             - contracts-bedrock-build
             - cannon-prestate

op-e2e/e2e.go

@@ -52,6 +52,13 @@ func UsesCannon(t e2eutils.TestingBase) {
 	}
 }
 
+// IsSlow indicates that the test is too expensive to run on the main CI workflow
+func IsSlow(t e2eutils.TestingBase) {
+	if os.Getenv("OP_E2E_SKIP_SLOW_TEST") == "true" {
+		t.Skip("Skipping slow test")
+	}
+}
+
 type executorInfo struct {
 	total      uint64
 	idx        uint64

op-e2e/faultproofs/output_alphabet_test.go

@@ -167,7 +167,7 @@ func TestOutputAlphabetGame_ValidOutputRoot(t *testing.T) {
 }
 
 func TestChallengerCompleteExhaustiveDisputeGame(t *testing.T) {
-	op_e2e.InitParallel(t)
+	op_e2e.InitParallel(t, op_e2e.IsSlow)
 
 	testCase := func(t *testing.T, isRootCorrect bool) {
 		ctx := context.Background()