Restore original test matrix to preserve required check names

Author: filip-parity

.github/scripts/matrices.py

@@ -76,20 +76,32 @@ def __init__(
 
 config = [
     Case(
-        name="all",
-        filter="!test(/\\bext_integration|polkadot_localnode/)",
-        n_partitions=2,
+        name="unit",
+        filter="!kind(test)",
+        n_partitions=1,
+        pr_cross_platform=True,
+    ),
+    Case(
+        name="integration",
+        filter="kind(test) & !test(/\\b(issue|ext_integration)|polkadot_localnode/)",
+        n_partitions=3,
         pr_cross_platform=True,
     ),
     Case(
-        name="external",
+        name="integration / issue-repros",
+        filter="package(=forge) & test(/\\bissue/)",
+        n_partitions=2,
+        pr_cross_platform=False,
+    ),
+    Case(
+        name="integration / external",
         filter="package(=forge) & test(/\\bext_integration/)",
-        n_partitions=1,
+        n_partitions=2,
         pr_cross_platform=False,
     ),
     # TODO: run the local node tests on polkadot-anvil
     # Case(
-    #     name="polkadot_localnode",
+    #     name="integration / polkadot_localnode",
     #     filter="(package(=cast) | package(=forge)) & test(/polkadot_localnode/)",
     #     n_partitions=1,
     #     pr_cross_platform=False,