Take out StepRun.names: the step ask no longer carries the registrations' names for a lint scan

The part build-step.json, its generated Go and TypeScript (seatgen, check clean), the three build seats' fixtures and sdk/buildstep lose StepNames and the ask's required names.

Builds: design 47 G §7, §328, §329

contracts/seats/node-build-node/fixtures/states.json

@@ -160,7 +160,7 @@
     }
   },
   {
-    "name": "a step ask of the runner with the names and kept results",
+    "name": "a step ask of the runner with its kept results",
     "of": "accept:check.step",
     "subject": "mesh.seat.node-build-node.accept.check.step",
     "given": {
@@ -183,19 +183,6 @@
           "repository": "novox/mesh-catalog",
           "commit": "0123456789abcdef0123456789abcdef01234567"
         },
-        "names": {
-          "modules": [
-            "nats",
-            "mesh-sdk"
-          ],
-          "repositories": [
-            "novox/mesh-catalog",
-            "novox/mesh-sdk"
-          ],
-          "branches": [
-            "main"
-          ]
-        },
         "kept": [
           {
             "package": "./modules/nats/a",
@@ -231,19 +218,6 @@
           "repository": "novox/mesh-catalog",
           "commit": "0123456789abcdef0123456789abcdef01234567"
         },
-        "names": {
-          "modules": [
-            "nats",
-            "mesh-sdk"
-          ],
-          "repositories": [
-            "novox/mesh-catalog",
-            "novox/mesh-sdk"
-          ],
-          "branches": [
-            "main"
-          ]
-        },
         "kept": [
           {
             "package": "./modules/nats/a",