chore(k6): Fix function context test (redwoodjs#9358)

**Changes**
1. Fixes the function context test to be correct - it should fail and it
does.
2. Adds a final output which shows the pass/fail of each test.
3. Is no longer verbose by default.
4. Is now run with `yarn test:k6` rather than `yarn benchmark` as it's
not really benchmarking so to speak.

**Future/Maybe here**
1. Update to include a server file version of the testing.

**Notes**
1. This isn't the most elegant of code but I'll update to address that
above point before I refactor it to be all nice and tidy.

package.json

@@ -11,7 +11,6 @@
     "packages/studio/web"
   ],
   "scripts": {
-    "benchmark": "tsx ./tasks/benchmark/run-benchmarks.mts",
     "build": "lerna run build",
     "build:clean": "yarn node ./tasks/clean.mjs",
     "build:clean:super": "git clean -fdx && yarn && yarn build",
@@ -31,7 +30,8 @@
     "release": "node ./tasks/release/releaseCLI.mjs",
     "smoke-test": "node ./tasks/smoke-tests/smoke-tests.mjs",
     "test": "lerna run test --concurrency 2 -- --colors --maxWorkers=4",
-    "test-ci": "lerna run test --concurrency 2 -- --colors --maxWorkers"
+    "test-ci": "lerna run test --concurrency 2 -- --colors --maxWorkers",
+    "test:k6": "tsx ./tasks/k6-test/run-k6-tests.mts"
   },
   "resolutions": {
     "vscode-languageserver": "6.1.1",

tasks/k6-test/README.md

@@ -0,0 +1,8 @@
+# K6 Task
+
+## Usage
+```
+yarn test:k6 [project-directory]
+```
+
+You can pass additional command line options if you need specific behaviour. These are documented in the `--help` output of the above command. The source code within `run-k6-tests.mts` will also be helpful in understanding the behaviour.