Fix vcr test testAccComputeInstance_networkPerformanceConfig

[modular-magician]

vcr test was failing due to api now not respecting the original creation defintion. Its setting a field that we are not.

  | 
  |       - guest_os_features { # forces replacement
  |           - type = "UEFI_COMPATIBLE" -> null
  |         }

upstream issue: go/mb/102410839

Derived from GoogleCloudPlatform/magic-modules#6456