Concurrent fixture tests

[GregBrimble]

trafficstars

This makes all the fixture tests less flaky, since they no longer compete for fixed ports. They all now start up on port 0 and await a message from wrangler telling them which port they were assigned. This means that the fixtures can be run concurrently.

• [x] Announce with IPC running server
• [x] Re-write tests to be concurrent and consume IPC message
• [x] local-mode-tests
• [x] Actually run the fixtures concurrently
• [x] external-durable-objects-app
• [ ] service-bindings-app
• [ ] https://github.com/cloudflare/miniflare/pull/382

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: edac49a0435baa954fa8b3626b6db39cac6be399

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[github-actions[bot]]

A wrangler prerelease is available for testing. You can install this latest build in your project with:

npm install --save-dev https://prerelease-registry.developers.workers.dev/runs/3083612480/npm-package-wrangler-1877

You can reference the automatically updated head of this PR with:

npm install --save-dev https://prerelease-registry.developers.workers.dev/prs/1877/npm-package-wrangler-1877

Or you can use npx with this latest build directly:

npx https://prerelease-registry.developers.workers.dev/runs/3083612480/npm-package-wrangler-1877 dev path/to/script.js

[codecov[bot]]

Codecov Report

Merging #1877 (757f493) into main (adfc52d) will decrease coverage by 0.00%. The diff coverage is 75.00%.

:exclamation: Current head 757f493 differs from pull request most recent head edac49a. Consider uploading reports for the commit edac49a to get more accurate results

@@            Coverage Diff             @@
##             main    #1877      +/-   ##
==========================================
- Coverage   77.49%   77.48%   -0.01%     
==========================================
  Files         105      105              
  Lines        7473     7472       -1     
  Branches     1972     1971       -1     
==========================================
- Hits         5791     5790       -1     
  Misses       1682     1682              

Impacted Files	Coverage Δ
packages/wrangler/src/dev/local.tsx	30.67% <0.00%> (ø)
packages/wrangler/src/dev.tsx	85.30% <100.00%> (-0.07%)	:arrow_down:
packages/wrangler/src/dev/start-server.ts	76.00% <100.00%> (ø)

[rozenmd]

I love this!