feat: added GenericInsight which exposes generic insights on assets

feat: added ComputeStorageDescriptor for Compute Engine migration insights
feat: added new target-related options to VirtualMachinePreferences
fix: deprecated the bios_name, total_rows_count and overlapping_asset_count fields
docs: updated performance_samples docs

PiperOrigin-RevId: 566201137

Source-Link: googleapis/googleapis@ba00ffd

Source-Link: googleapis/googleapis-gen@0c9f327
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