Build x86-64-avx512icl in CI

closes https://github.com/official-stockfish/Stockfish/pull/6217

No functional change

.github/ci/matrix.json

@@ -63,6 +63,7 @@
     "x86-64-avx512",
     "x86-64-vnni256",
     "x86-64-vnni512",
+    "x86-64-avx512icl",
     "apple-silicon",
     "armv8",
     "armv8-dotprod"
@@ -116,6 +117,12 @@
         "os": "macos-14"
       }
     },
+    {
+      "binaries": "x86-64-avx512icl",
+      "config": {
+        "os": "macos-14"
+      }
+    },
     {
       "binaries": "x86-64-avxvnni",
       "config": {
@@ -140,6 +147,12 @@
         "os": "macos-13"
       }
     },
+    {
+      "binaries": "x86-64-avx512icl",
+      "config": {
+        "os": "macos-13"
+      }
+    },
     {
       "binaries": "x86-64",
       "config": {
@@ -188,6 +201,12 @@
         "os": "windows-11-arm"
       }
     },
+    {
+      "binaries": "x86-64-avx512icl",
+      "config": {
+        "os": "windows-11-arm"
+      }
+    },
     {
       "binaries": "apple-silicon",
       "config": {