[DX-3281] fix: Skip stack settings import when using management token

[AniketDev7]

Issue Description

The import command fails with "Session timed out, please login to proceed" error when using management token alias (-a flag) due to unsupported stack settings operations.

Root Cause

PR #1979 added stack settings import functionality but didn't include management token handling, causing timeout errors similar to what was fixed for export in PR #1983.

Solution

Applied the same management token protection pattern from export fix (PR #1983) to the import functionality.

Changes Made:

1. Import Stack Module (stack.ts): Skip addSettings operation when using management token
2. Module Importer (module-importer.ts): Fixed sanitizeStack function call parameter
3. Common Helper (common-helper.ts): Added management token protection to sanitizeStack

Existing Auth Methods (--stack-api-key, OAuth):

• No changes - all existing authentication flows work exactly as before
• Stack settings import continues to work normally

Backward Compatibility

• Zero breaking changes for existing authentication methods
• Conditional logic only affects management token flows
• Battle-tested pattern - same approach as successful export fix in PR Skip stack settings export when using a management token #1983

📋 Checklist

• Applied same pattern as export fix (PR Skip stack settings export when using a management token #1983)
• Maintains backward compatibility with all auth methods
• Added informative logging for skipped operations
• Fixed related function call parameter issue
• Tested with management token - no more timeouts
• Verified existing auth flows remain unchanged
• CLI sanity run completed & passed

Related

• Fixes timeout issue introduced by PR dx | 3097 import stack settings #1979 (import stack settings)
• Follows same approach as PR Skip stack settings export when using a management token #1983 (export stack settings fix)
• Ensures parity between import and export command behavior

[shafeeqd959]

@AniketDev7 can you add sanity report ? this PR will be a reference

[AniketDev7]

@AniketDev7 can you add sanity report ? this PR will be a reference

Hi @shafeeqd959 The sanity report link is already shared while requesting the PR review itself and u r tagged in the slack channel thread.
For the reference, the checklist item is added for Sanity sign off.