ci: move galahad filtering to overlays

ci-branch-config.jsonnet

@@ -1,14 +1,14 @@
 {
  "galahad.*": {
- "config_file": "galahad.jsonnet",
+ "config_file": "ci.jsonnet",
  "overlay_file": "galahad-graal.jsonnet",
  },
  "release/galahad/.*": {
- "config_file": "galahad.jsonnet",
+ "config_file": "ci.jsonnet",
  "overlay_file": "galahad-graal.jsonnet",
  },
  "cpu/galahad/.*": {
- "config_file": "galahad.jsonnet",
+ "config_file": "ci.jsonnet",
  "overlay_file": "galahad-graal.jsonnet",
  },
 }

ci.jsonnet

@@ -63,6 +63,4 @@ local verify_ci = (import 'ci/ci_common/ci-check.libsonnet').verify_ci;
  assert verify_ci(self.builds),
  // verify that the run-spec demo works
  assert (import "ci/ci_common/run-spec-demo.jsonnet").check(),
- // ensure that the galahad CI configuration does not break
- assert std.type(std.manifestJson((import "galahad.jsonnet").builds)) == "string"
 }