feat(unstable): add test for lint plugin destroy hook (#27981)

Noticed that we didn't test the `destroy()` hook of lint plugins. This
PR adds a test for that.

tests/specs/lint/lint_plugin_lifecycle/__test__.jsonc

@@ -0,0 +1,8 @@
+{
+  "steps": [
+    {
+      "args": "lint a.ts",
+      "output": "lint.out"
+    }
+  ]
+}

tests/specs/lint/lint_plugin_lifecycle/a.ts

@@ -0,0 +1 @@
+const _a = "foo";

tests/specs/lint/lint_plugin_lifecycle/deno.json

@@ -0,0 +1,5 @@
+{
+  "lint": {
+    "plugins": ["./plugin.ts"]
+  }
+}

tests/specs/lint/lint_plugin_lifecycle/lint.out

@@ -0,0 +1,5 @@
+create: test-plugin/my-rule
+create: test-plugin/my-rule-2
+destroy: test-plugin/my-rule
+destroy: test-plugin/my-rule-2
+Checked 1 file

tests/specs/lint/lint_plugin_lifecycle/plugin.ts

@@ -0,0 +1,23 @@
+export default {
+  name: "test-plugin",
+  rules: {
+    "my-rule": {
+      create(ctx) {
+        console.log(`create: ${ctx.id}`);
+        return {};
+      },
+      destroy(ctx) {
+        console.log(`destroy: ${ctx.id}`);
+      },
+    },
+    "my-rule-2": {
+      create(ctx) {
+        console.log(`create: ${ctx.id}`);
+        return {};
+      },
+      destroy(ctx) {
+        console.log(`destroy: ${ctx.id}`);
+      },
+    },
+  },
+};