✨ Add logConfig to GCP compute subnetwork

[imilchev]

./cnquery run gcp -c "gcp.project.compute.subnetworks.where( logConfig != null ){logConfig{*}}"                                                                                                                                              
→ discover related assets for 1 asset(s)
→ resolved assets resolved-assets=1
gcp.project.compute.subnetworks.where: [
  0: {
    logConfig: {
      flowSampling: 0.5
      filterExpression: ""
      metadata: "INCLUDE_ALL_METADATA"
      id: "1373031056937448960/logConfig"
      aggregationInterval: "INTERVAL_5_SEC"
      metadataFields: []
      enable: false
    }
  }
  1: {
    logConfig: {
      flowSampling: 0.5
      filterExpression: ""
      metadata: "INCLUDE_ALL_METADATA"
      id: "4529100599432984582/logConfig"
      aggregationInterval: "INTERVAL_5_SEC"
      metadataFields: []
      enable: false
    }
  }
]