feat: add 1.4.1 contracts for Asset Chain Testent (#864)

## Add new chain

Please fill the following form:

Provide the Chain ID (Only 1 chain id per PR).
- Chain_ID: 42421

Provide RPC URL for the chain (should be able to query atleast 3+
requests per second for automatic PR check).
- RPC_URL: https://enugu-rpc.assetchain.org

Relevant information:Add any other relevant information like block
explorer, any annotation...

- safe-singleton-factory issue:
safe-global/safe-singleton-factory#681
- block explorer:  https://scan-testnet.assetchain.org

src/assets/v1.4.1/compatibility_fallback_handler.json

@@ -115,6 +115,7 @@
     "41455": "canonical",
     "42161": "canonical",
     "42220": "canonical",
+    "42421": "canonical",
     "43114": "canonical",
     "44787": "canonical",
     "54211": "canonical",

src/assets/v1.4.1/create_call.json

@@ -115,6 +115,7 @@
     "41455": "canonical",
     "42161": "canonical",
     "42220": "canonical",
+    "42421": "canonical",
     "43114": "canonical",
     "44787": "canonical",
     "54211": "canonical",

src/assets/v1.4.1/multi_send.json

@@ -115,6 +115,7 @@
     "41455": "canonical",
     "42161": "canonical",
     "42220": "canonical",
+    "42421": "canonical",
     "43114": "canonical",
     "44787": "canonical",
     "54211": "canonical",

src/assets/v1.4.1/multi_send_call_only.json

@@ -115,6 +115,7 @@
     "41455": "canonical",
     "42161": "canonical",
     "42220": "canonical",
+    "42421": "canonical",
     "43114": "canonical",
     "44787": "canonical",
     "54211": "canonical",

src/assets/v1.4.1/safe.json

@@ -115,6 +115,7 @@
     "41455": "canonical",
     "42161": "canonical",
     "42220": "canonical",
+    "42421": "canonical",
     "43114": "canonical",
     "44787": "canonical",
     "54211": "canonical",

src/assets/v1.4.1/safe_l2.json

@@ -115,6 +115,7 @@
     "41455": "canonical",
     "42161": "canonical",
     "42220": "canonical",
+    "42421": "canonical",
     "43114": "canonical",
     "44787": "canonical",
     "54211": "canonical",

src/assets/v1.4.1/safe_migration.json

@@ -34,6 +34,7 @@
     "13746": "canonical",
     "42161": "canonical",
     "42220": "canonical",
+    "42421": "canonical",
     "43114": "canonical",
     "44787": "canonical",
     "59144": "canonical",

src/assets/v1.4.1/safe_proxy_factory.json

@@ -115,6 +115,7 @@
     "41455": "canonical",
     "42161": "canonical",
     "42220": "canonical",
+    "42421": "canonical",
     "43114": "canonical",
     "44787": "canonical",
     "54211": "canonical",

src/assets/v1.4.1/safe_to_l2_migration.json

@@ -34,6 +34,7 @@
     "13746": "canonical",
     "42161": "canonical",
     "42220": "canonical",
+    "42421": "canonical",
     "43114": "canonical",
     "44787": "canonical",
     "59144": "canonical",

src/assets/v1.4.1/safe_to_l2_setup.json

@@ -34,6 +34,7 @@
     "13746": "canonical",
     "42161": "canonical",
     "42220": "canonical",
+    "42421": "canonical",
     "43114": "canonical",
     "44787": "canonical",
     "59144": "canonical",

src/assets/v1.4.1/sign_message_lib.json

@@ -115,6 +115,7 @@
     "41455": "canonical",
     "42161": "canonical",
     "42220": "canonical",
+    "42421": "canonical",
     "43114": "canonical",
     "44787": "canonical",
     "54211": "canonical",

src/assets/v1.4.1/simulate_tx_accessor.json

@@ -115,6 +115,7 @@
     "41455": "canonical",
     "42161": "canonical",
     "42220": "canonical",
+    "42421": "canonical",
     "43114": "canonical",
     "44787": "canonical",
     "54211": "canonical",