Add unit tests for VirtV2vInspectorExtraArgs in pkg/settings/migration.go

[coderabbitai]

Context

This issue tracks the need for unit tests for the VirtV2vInspectorExtraArgs functionality introduced in PR #4509.

Description

The code at lines 224-231 in pkg/settings/migration.go needs unit test coverage for the VirtV2vInspectorExtraArgs parsing logic.

Required Test Coverage

Tests should verify:

• Default value ("[]") when the environment variable is unset
• Valid parsing when the environment variable contains space-separated arguments
• Empty string handling

References

• PR: MTV-4454 | Separate extra args for virt-v2v conversion and inspection #4509
• Review comment: MTV-4454 | Separate extra args for virt-v2v conversion and inspection #4509 (comment)
• Requested by: @yaacov