Fix linting errors in error handling refactor

[Copilot]

Fixed linting errors introduced during the error handling refactor that centralized error definitions across packages.

Import consolidation

• Merged duplicate @microsoft/agents-activity imports in dialogHelper.ts, teamsConnectorClient.ts, and teamsInfo.ts
• Removed unused AttachmentInfo import from cloudAdapter.ts

Code style fixes

• Corrected 234 indentation errors in errorHelper.ts (4 spaces → 2 spaces)
• Fixed indentation and spacing in taskModule.ts
• Applied property shorthand in cosmosDbPartitionedStorage.ts
• Removed trailing spaces and extra semicolons

Test corrections

• Updated error code assertions in errorHelper.test.ts to match actual error codes (e.g., -120001 → -120010, -120025 → -120250)

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