Fix and re-enable `zombienet-substrate-0002-validators-warp-sync` (#6154)

Closes https://github.com/paritytech/polkadot-sdk/issues/5974

Fixed as per
https://github.com/paritytech/polkadot-sdk/issues/5974#issuecomment-2426463359

.gitlab/pipeline/zombienet/substrate.yml

@@ -70,11 +70,11 @@ zombienet-substrate-0001-basic-warp-sync:
       --local-dir="${LOCAL_DIR}/0001-basic-warp-sync"
       --test="test-warp-sync.zndsl"
 
-.zombienet-substrate-0002-validators-warp-sync:
+zombienet-substrate-0002-validators-warp-sync:
   extends:
     - .zombienet-substrate-warp-sync-common
   before_script:
-    - !reference [.zombienet-substrate-warp-sync-common, before_script]
+    - !reference [ .zombienet-substrate-warp-sync-common, before_script ]
     - cp --remove-destination ${LOCAL_DIR}/0001-basic-warp-sync/chain-spec.json ${LOCAL_DIR}/0002-validators-warp-sync
   script:
     - /home/nonroot/zombie-net/scripts/ci/run-test-local-env-manager.sh
@@ -85,7 +85,7 @@ zombienet-substrate-0003-block-building-warp-sync:
   extends:
     - .zombienet-substrate-warp-sync-common
   before_script:
-    - !reference [.zombienet-substrate-warp-sync-common, before_script]
+    - !reference [ .zombienet-substrate-warp-sync-common, before_script ]
     - cp --remove-destination ${LOCAL_DIR}/0001-basic-warp-sync/chain-spec.json ${LOCAL_DIR}/0003-block-building-warp-sync
   script:
     - /home/nonroot/zombie-net/scripts/ci/run-test-local-env-manager.sh

substrate/zombienet/0002-validators-warp-sync/test-validators-warp-sync.toml

@@ -11,12 +11,12 @@ chain_spec_path = "chain-spec.json"
   [[relaychain.nodes]]
   name = "alice"
   validator = true
-  args = ["--sync warp"]
+  args = ["--log=beefy=debug", "--sync warp"]
 
   [[relaychain.nodes]]
   name = "bob"
   validator = true
-  args = ["--sync warp"]
+  args = ["--log=beefy=debug", "--sync warp"]
 
   # we need at least 3 nodes for warp sync
   [[relaychain.nodes]]

substrate/zombienet/0002-validators-warp-sync/test-validators-warp-sync.zndsl

@@ -31,11 +31,9 @@ bob: log line matches "Block history download is complete" within 120 seconds
 alice: reports block height is at least {{DB_BLOCK_HEIGHT}} within 10 seconds
 bob: reports block height is at least {{DB_BLOCK_HEIGHT}} within 10 seconds
 
-alice: reports substrate_beefy_best_block is at least {{DB_BLOCK_HEIGHT}} within 180 seconds
-bob: reports substrate_beefy_best_block is at least {{DB_BLOCK_HEIGHT}} within 180 seconds
-
-alice: reports substrate_beefy_best_block is greater than {{DB_BLOCK_HEIGHT}} within 180 seconds
-bob: reports substrate_beefy_best_block is greater than {{DB_BLOCK_HEIGHT}} within 180 seconds
+# In the worst case scenario, the validators should vote on 1 mandatory block each 6 seconds. And 1 era = 200 blocks.
+alice: reports substrate_beefy_best_block is at least {{200*180/6}} within 180 seconds
+bob: reports substrate_beefy_best_block is at least {{200*180/6}} within 180 seconds
 
 alice: count of log lines containing "error" is 0 within 10 seconds
 bob: count of log lines containing "verification failed" is 0 within 10 seconds