d/azurerm_network_interface: Support for gateway_load_balancer_frontend_ip_configuration_id to prevent nilpointer

[aristosvo]

Fixes #13858
Fixes #13918
Error introduced in #13559

• Docs

Reproduction via AccTest

❯ go install && make acctests SERVICE='network' TESTARGS='-run=TestAccDataSourceArmNetworkInterface_basic'
==> Checking that code complies with gofmt requirements...
==> Checking that Custom Timeouts are used...
==> Checking that acceptance test packages are used...
TF_ACC=1 go test -v ./internal/services/network -run=TestAccDataSourceArmNetworkInterface_basic -timeout 180m -ldflags="-X=github.com/hashicorp/terraform-provider-azurerm/version.ProviderVersion=acc"
=== RUN   TestAccDataSourceArmNetworkInterface_basic
=== PAUSE TestAccDataSourceArmNetworkInterface_basic
=== CONT  TestAccDataSourceArmNetworkInterface_basic
panic: Invalid address to set: []string{"ip_configuration", "0", "gateway_load_balancer_frontend_ip_configuration_id"}

goroutine 1330 [running]:
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*ResourceData).Set(0xc002a58b80, 0x74e8fd0, 0x10, 0x6a014e0, 0xc0027a1ae8, 0x0, 0x0)
        /Users/aris/git/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema/resource_data.go:230 +0x371
github.com/hashicorp/terraform-provider-azurerm/internal/services/network.dataSourceNetworkInterfaceRead(0xc002a58b80, 0x6bc6a40, 0xc00157ca80, 0x0, 0x0)
        /Users/aris/git/terraform-provider-azurerm/internal/services/network/network_interface_data_source.go:225 +0x8f7
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*Resource).read(0xc0005dda40, 0x7d7f7e8, 0xc004061580, 0xc002a58b80, 0x6bc6a40, 0xc00157ca80, 0x0, 0x0, 0x0)
        /Users/aris/git/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema/resource.go:335 +0x1ee
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*Resource).ReadDataApply(0xc0005dda40, 0x7d7f7e8, 0xc004061580, 0xc003675be0, 0x6bc6a40, 0xc00157ca80, 0xc00157ca80, 0xc003675be0, 0x0, 0x0)
        /Users/aris/git/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema/resource.go:558 +0xfd
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*GRPCProviderServer).ReadDataSource(0xc002c34cd8, 0x7d7f7e8, 0xc004061580, 0xc003675960, 0xc004061580, 0x100d725, 0x6f2a3a0)
        /Users/aris/git/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema/grpc_provider.go:1105 +0x4d6
github.com/hashicorp/terraform-plugin-go/tfprotov5/server.(*server).ReadDataSource(0xc000e0dcc0, 0x7d7f890, 0xc004061580, 0xc003045cc0, 0xc000e0dcc0, 0xc0042960f0, 0xc001ddfba0)
        /Users/aris/git/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform-plugin-go/tfprotov5/server/server.go:247 +0xe5
github.com/hashicorp/terraform-plugin-go/tfprotov5/internal/tfplugin5._Provider_ReadDataSource_Handler(0x710a080, 0xc000e0dcc0, 0x7d7f890, 0xc0042960f0, 0xc001194000, 0x0, 0x7d7f890, 0xc0042960f0, 0xc0036b0000, 0x182)
        /Users/aris/git/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform-plugin-go/tfprotov5/internal/tfplugin5/tfplugin5_grpc.pb.go:416 +0x214
google.golang.org/grpc.(*Server).processUnaryRPC(0xc0014d0000, 0x7dd35b8, 0xc004ab8f00, 0xc0036ac900, 0xc002f34d80, 0xbb2f350, 0x0, 0x0, 0x0)
        /Users/aris/git/terraform-provider-azurerm/vendor/google.golang.org/grpc/server.go:1292 +0x52b
google.golang.org/grpc.(*Server).handleStream(0xc0014d0000, 0x7dd35b8, 0xc004ab8f00, 0xc0036ac900, 0x0)
        /Users/aris/git/terraform-provider-azurerm/vendor/google.golang.org/grpc/server.go:1617 +0xd0c
google.golang.org/grpc.(*Server).serveStreams.func1.2(0xc00185e850, 0xc0014d0000, 0x7dd35b8, 0xc004ab8f00, 0xc0036ac900)
        /Users/aris/git/terraform-provider-azurerm/vendor/google.golang.org/grpc/server.go:940 +0xab
created by google.golang.org/grpc.(*Server).serveStreams.func1
        /Users/aris/git/terraform-provider-azurerm/vendor/google.golang.org/grpc/server.go:938 +0x1fd
FAIL    github.com/hashicorp/terraform-provider-azurerm/internal/services/network       76.235s
FAIL
make: *** [acctests] Error 1

Fixed according to AccTest

❯ go install && make acctests SERVICE='network' TESTARGS='-run=TestAccDataSourceArmNetworkInterface_basic'
==> Checking that code complies with gofmt requirements...
==> Checking that Custom Timeouts are used...
==> Checking that acceptance test packages are used...
TF_ACC=1 go test -v ./internal/services/network -run=TestAccDataSourceArmNetworkInterface_basic -timeout 180m -ldflags="-X=github.com/hashicorp/terraform-provider-azurerm/version.ProviderVersion=acc"
=== RUN   TestAccDataSourceArmNetworkInterface_basic
=== PAUSE TestAccDataSourceArmNetworkInterface_basic
=== CONT  TestAccDataSourceArmNetworkInterface_basic
--- PASS: TestAccDataSourceArmNetworkInterface_basic (228.14s)
PASS
ok      github.com/hashicorp/terraform-provider-azurerm/internal/services/network       229.711s

[katbyte]

Thanks @aristosvo - LGTM 🤕

[github-actions]

This functionality has been released in v2.83.0 of the Terraform Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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