Always use forward slashes for python workers path handling

[ryanking13]

• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows:
  • Additional testing not necessary because:
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: Python workers currently have a separate doc (https://github.com/cloudflare/workers-py)

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This fixes incorrect path handling in deploying python workers in windows environment. We I try to deploy Python workers in windows environment, the path separator in windows \ is not considered as a proper path separator and the whole full path is considered as a single file. This PR fixes it.

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[changeset-bot]

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Latest commit: 17d53ea

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[claude]

Claude finished @ryanking13's task —— View job

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[devin-ai-integration]

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commit: 17d53ea

[vicb]

See the inline comment

[devin-ai-integration]

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[vicb]

LGTM thanks for the update @ryanking13