fix(ci): add missing variable ZEBRA_CACHED_STATE_DIR to workflows

.github/workflows/sub-ci-integration-tests-gcp.yml

@@ -83,7 +83,7 @@ jobs:
       app_name: zebrad
       test_id: sync-to-checkpoint
       test_description: Test sync up to mandatory checkpoint
-      test_variables: "-e NETWORK=${{ inputs.network || vars.ZCASH_NETWORK }} -e TEST_DISK_REBUILD=1 -e ZEBRA_FORCE_USE_COLOR=1"
+      test_variables: "-e NETWORK=${{ inputs.network || vars.ZCASH_NETWORK }} -e TEST_DISK_REBUILD=1 -e ZEBRA_FORCE_USE_COLOR=1 -e ZEBRA_CACHED_STATE_DIR=/var/cache/zebrad-cache"
       needs_zebra_state: false
       saves_to_disk: true
       force_save_to_disk: ${{ inputs.force_save_to_disk || false }}
@@ -112,7 +112,7 @@ jobs:
       app_name: zebrad
       test_id: sync-past-checkpoint
       test_description: Test full validation sync from a cached state
-      test_variables: "-e NETWORK=${{ inputs.network || vars.ZCASH_NETWORK }} -e TEST_CHECKPOINT_SYNC=1 -e ZEBRA_FORCE_USE_COLOR=1"
+      test_variables: "-e NETWORK=${{ inputs.network || vars.ZCASH_NETWORK }} -e TEST_CHECKPOINT_SYNC=1 -e ZEBRA_FORCE_USE_COLOR=1 -e ZEBRA_CACHED_STATE_DIR=/var/cache/zebrad-cache"
       needs_zebra_state: true
       saves_to_disk: false
       disk_suffix: checkpoint
@@ -142,7 +142,7 @@ jobs:
       test_description: Test a full sync up to the tip
       # The value of FULL_SYNC_MAINNET_TIMEOUT_MINUTES is currently ignored.
       # TODO: update the test to use {{ input.network }} instead?
-      test_variables: "-e NETWORK=Mainnet -e FULL_SYNC_MAINNET_TIMEOUT_MINUTES=0 -e ZEBRA_FORCE_USE_COLOR=1"
+      test_variables: "-e NETWORK=Mainnet -e FULL_SYNC_MAINNET_TIMEOUT_MINUTES=0 -e ZEBRA_FORCE_USE_COLOR=1 -e ZEBRA_CACHED_STATE_DIR=/var/cache/zebrad-cache"
       # This test runs for longer than 6 hours, so it needs multiple jobs
       is_long_test: true
       needs_zebra_state: false
@@ -245,7 +245,7 @@ jobs:
       test_id: full-sync-testnet
       test_description: Test a full sync up to the tip on testnet
       # The value of FULL_SYNC_TESTNET_TIMEOUT_MINUTES is currently ignored.
-      test_variables: "-e NETWORK=Testnet -e FULL_SYNC_TESTNET_TIMEOUT_MINUTES=0 -e ZEBRA_FORCE_USE_COLOR=1"
+      test_variables: "-e NETWORK=Testnet -e FULL_SYNC_TESTNET_TIMEOUT_MINUTES=0 -e ZEBRA_FORCE_USE_COLOR=1 -e ZEBRA_CACHED_STATE_DIR=/var/cache/zebrad-cache"
       network: "Testnet"
       # A full testnet sync could take 2-10 hours in April 2023.
       # The time varies a lot due to the small number of nodes.