Install libc++1 in GitHub actions jobs

[mrbbot]

This is required by workerd at runtime. It also looks like this is indirectly required by workerd's install script, so we need to install this any time we call npm ci.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 283c602

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

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[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.developers.workers.dev/runs/3463827880/npm-package-wrangler-2173

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

npm install --save-dev https://prerelease-registry.developers.workers.dev/prs/2173/npm-package-wrangler-2173

Or you can use npx with this latest build directly:

npx https://prerelease-registry.developers.workers.dev/runs/3463827880/npm-package-wrangler-2173 dev path/to/script.js

Additional artifacts:

npm install https://prerelease-registry.developers.workers.dev/runs/3463827880/npm-package-cloudflare-pages-shared-2173

[codecov]

Codecov Report

Merging #2173 (283c602) into main (ac4deef) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2173      +/-   ##
==========================================
+ Coverage   73.26%   73.28%   +0.01%     
==========================================
  Files         141      141              
  Lines        9087     9087              
  Branches     2369     2369              
==========================================
+ Hits         6658     6659       +1     
+ Misses       2429     2428       -1     

Impacted Files	Coverage Δ
...ackages/wrangler/src/__tests__/helpers/mock-bin.ts	100.00% <0.00%> (+5.26%)	⬆️

[JacobMGEvans]

Not thrilled this is needed.

[caass]

Is it possible to statically link this in CI?