feat: Implemented deleteFile Tck endpoint

[Adityarya11]

Description:
Implements the deleteFile JSON-RPC endpoint for the TCK server to support file deletion compatibility tests.

• Add deleteFile method to FileService utilizing FileDeleteTransaction
• Create DeleteFileParams for JSON deserialization and register the endpoint in TckServer

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Related issue(s):

Fixes #1215

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Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[github-actions]

Hey @Adityarya11 👋 thanks for the PR!
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PR Checks

✅ DCO Sign-off -- All commits have valid sign-offs. Nice work!

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✅ Issue Link -- Linked to #1215 (assigned to you).

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[rwalworth]

LGTM @Adityarya11, clean implementation that follows the deleteToken pattern exactly. Merging!