[wrangler] fix: require worker name for rollback

[mrbbot]

Fixes #3372.

What this PR solves / how to test:

Previously, Wrangler would fail with a cryptic error if you tried to run wrangler rollback outside of a directory containing a Wrangler configuration file with a name defined. This change validates that a worker name is defined, and allows you to set it from the command line using the --name flag. To test this, try to run wrangler rollback in a directory without a wrangler.toml. This should fail, but running wrangler rollback --name <NAME_TO_VALID_WORKER> should succeed.

Author has addressed the following:

• Tests
  • Included
  • Not necessary because:
• Changeset (Changeset guidelines)
  • Included
  • Not necessary because:
• Associated docs
  • Issue(s)/PR(s): [Workers] Add wrangler rollback --name flag cloudflare-docs#12204
  • Not necessary because:

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[changeset-bot]

🦋 Changeset detected

Latest commit: b86926f

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

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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.devprod.cloudflare.dev/workers-sdk/runs/7291004825/npm-package-wrangler-4588

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npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/7291004825/npm-package-miniflare-4588

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---

wrangler@3.22.1 includes the following runtime dependencies:

Package	Constraint	Resolved
miniflare	workspace:*	3.20231030.4
workerd	1.20231030.0	1.20231030.0
workerd --version	1.20231030.0	2023-10-30

|

Please ensure constraints are pinned, and miniflare/workerd minor versions match.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4864013) 75.16% compared to head (b86926f) 75.22%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4588      +/-   ##
==========================================
+ Coverage   75.16%   75.22%   +0.05%     
==========================================
  Files         242      242              
  Lines       13014    13017       +3     
  Branches     3346     3346              
==========================================
+ Hits         9782     9792      +10     
+ Misses       3232     3225       -7     

Files	Coverage Δ
.../src/__tests__/helpers/msw/handlers/deployments.ts	75.86% <100.00%> (+2.78%)	⬆️
packages/wrangler/src/deployments.ts	76.19% <100.00%> (ø)
packages/wrangler/src/index.ts	89.04% <ø> (ø)

... and 7 files with indirect coverage changes