Add Abstract Chain Testnet (ethereum-lists#5581)

* Create eip155-11124

* Rename eip155-11124 to eip155-11124.json

_data/chains/eip155-11124.json

@@ -0,0 +1,27 @@
+{
+  "name": "Abstract Testnet",
+  "chain": "Abstract Testnet",
+  "rpc": ["https://api.testnet.abs.xyz"],
+  "faucets": ["https://faucet.triangleplatform.com/abstract/testnet"],
+  "chainId": 11124,
+  "networkId": 11124,
+  "nativeCurrency": {
+    "name": "ETH",
+    "symbol": "ETH",
+    "decimals": 18
+  },
+  "infoURL": "https://abs.xyz/",
+  "shortName": "Abstract",
+  "parent": {
+    "type": "L2",
+    "chain": "eip155-11155111",
+    "bridges": [{ "url": "https://portal.testnet.abs.xyz/bridge" }]
+  },
+  "explorers": [
+    {
+      "name": "Abstract Block Explorer",
+      "url": "https://explorer.testnet.abs.xyz",
+      "standard": "none"
+    }
+  ]
+}