chore: re-enable Ignition core integration tests

In the CI use `pnpm test:ci` to run both the unit tests on Ignition core
and the integration tests against a local Hardhat network.

We force the building of everything before testing Ignition core as the
integration tests use Hardhat for the network (but not within the
production code).

Author: kanej

.github/workflows/hardhat-ci.yml

@@ -107,4 +107,4 @@ jobs:
       - name: Build
         run: pnpm build
       - name: Run tests
-        run: pnpm run ${{ matrix.package == 'hardhat-chai-matchers' && 'test:ci' || 'test' }}
+        run: pnpm run ${{ contains(fromJson('["hardhat-chai-matchers", "hardhat-ignition-core"]'), matrix.package) && 'test:ci' || 'test' }}

packages/hardhat-ignition-core/package.json

@@ -42,6 +42,8 @@
     "test:build": "tsc --project ./test/",
     "test:coverage": "nyc mocha --recursive \"test/**/*.ts\" \"test-integrations/**/*.ts\"",
     "test:integrations": "mocha --recursive \"test-integrations/**/*.ts\"",
+    "pretest:ci": "cd ../.. && pnpm build",
+    "test:ci": "pnpm test && pnpm pnpm test:integrations",
     "clean": "rimraf .nyc_output coverage dist tsconfig.tsbuildinfo",
     "prepack": "pnpm build"
   },