Update File() location with FileSMB()

[dphulkar-msft]

Description

This PR will be merged directly to main after all the NFS Phase-2 changes are merged to main to avoid merge conflicts.

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Type of Change

• Bug fix
• New feature
• Documentation update required
• Code quality improvement
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Pull Request Overview

This PR refactors Azure Files location handling by introducing FileSMB as a replacement for File to differentiate SMB shares from NFS shares. This change addresses scenarios where separate handling is needed for SMB and NFS file share protocols.

• Replaces common.ELocation.File() with common.ELocation.FileSMB() throughout the codebase
• Updates fromTo mappings to use the new FileSMB location type
• Maintains backward compatibility for existing file operations while enabling protocol-specific handling

Reviewed Changes

Copilot reviewed 54 out of 54 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
common/fe-ste-models.go	Updates location definitions and fromTo mappings to replace File() with FileSMB()
ste/xfer.go	Updates transfer logic to use FileSMB location for Azure Files operations
cmd/validators.go	Updates URL inference logic to use FileSMB for file.core.windows.net endpoints
Various test files	Updates test scenarios to use FileSMB location instead of File
Various STE files	Updates transfer managers and processors to use FileSMB location

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