[wrangler] Fix compile loop with _worker.js and wrangler pages dev

[GregBrimble]

What this PR solves / how to test:

• Run npm run dev in fixtures/pages-workerjs-app
• Note the lack of compile loop :)

Associated docs issues/PR:

• [insert associated docs issue(s)/PR(s)]

Author has included the following, where applicable:

• Tests
• Changeset

Reviewer has performed the following, where applicable:

• Checked for inclusion of relevant tests
• Checked for inclusion of a relevant changeset
• Checked for creation of associated docs updates
• Manually pulled down the changes and spot-tested

Fixes # [insert issue number].

[changeset-bot]

🦋 Changeset detected

Latest commit: 493f381

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
wrangler	Patch

Not sure what this means? Click here to learn what changesets are.

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

[codecov]

Codecov Report

Merging #2873 (493f381) into main (763f3f6) will increase coverage by 0.02%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #2873      +/-   ##
==========================================
+ Coverage   73.93%   73.96%   +0.02%     
==========================================
  Files         166      166              
  Lines       10251    10251              
  Branches     2745     2745              
==========================================
+ Hits         7579     7582       +3     
+ Misses       2672     2669       -3     

Impacted Files	Coverage Δ
packages/wrangler/src/pages/dev.ts	18.77% <0.00%> (ø)
packages/wrangler/src/git-client.ts	43.75% <0.00%> (+4.16%)	⬆️
...ackages/wrangler/src/__tests__/helpers/mock-bin.ts	100.00% <0.00%> (+5.26%)	⬆️

[dario-piotrowicz]

awesome! 😃

[github-actions]

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

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/4364038159/npm-package-wrangler-2873

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

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/prs/2873/npm-package-wrangler-2873

Or you can use npx with this latest build directly:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/4364038159/npm-package-wrangler-2873 dev path/to/script.js

Additional artifacts:

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/4364038159/npm-package-cloudflare-pages-shared-2873

Note that these links will no longer work once the GitHub Actions artifact expires.