Fix scanning unsupported clouds

[dwertent]

Overview

This PR fixes the panic we get when scanning unsupported clouds.

I scanned a cluster running on DigitalOcean and I got the following panic:

panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x1d6a7c2]

goroutine 10 [running]:
go.opentelemetry.io/otel/sdk/trace.(*recordingSpan).End.func1()
	/go/pkg/mod/go.opentelemetry.io/otel/sdk@v1.24.0/trace/span.go:405 +0x25
go.opentelemetry.io/otel/sdk/trace.(*recordingSpan).End(0xc000ff8300, {0x0, 0x0, 0xbad95c8cf62385b4?})
	/go/pkg/mod/go.opentelemetry.io/otel/sdk@v1.24.0/trace/span.go:443 +0xa3b
panic({0x3c48160?, 0x75a9ca0?})
	/usr/local/go/src/runtime/panic.go:914 +0x21f
go.opentelemetry.io/otel/sdk/trace.(*recordingSpan).End.func1()
	/go/pkg/mod/go.opentelemetry.io/otel/sdk@v1.24.0/trace/span.go:405 +0x25
go.opentelemetry.io/otel/sdk/trace.(*recordingSpan).End(0xc001a6e300, {0x0, 0x0, 0x47d0ea?})
	/go/pkg/mod/go.opentelemetry.io/otel/sdk@v1.24.0/trace/span.go:443 +0xa3b
panic({0x3c48160?, 0x75a9ca0?})
	/usr/local/go/src/runtime/panic.go:914 +0x21f
github.com/kubescape/k8s-interface/cloudsupport/v1.(*CloudProviderDescribe).GetApiVersion(...)
	/go/pkg/mod/github.com/kubescape/k8s-interface@v0.0.166/cloudsupport/v1/methods.go:84
github.com/kubescape/k8s-interface/cloudsupport/v1.(*CloudProviderDescribe).GetID(0x0)
	/go/pkg/mod/github.com/kubescape/k8s-interface@v0.0.166/cloudsupport/v1/methods.go:127 +0x22
github.com/kubescape/kubescape/v3/core/pkg/resourcehandler.(*K8sResourceHandler).collectCloudResources(0xc001b36fc0, {0x5059de0, 0xc0010109f0}, 0xc000f6d600, 0x7?, 0xc000f75600?, {0xc00262d980, 0x3, 0x3bc1740?}, {0x5050b70, ...})
	/work/core/pkg/resourcehandler/k8sresources.go:243 +0x822
github.com/kubescape/kubescape/v3/core/pkg/resourcehandler.(*K8sResourceHandler).GetResources(0xc001b36fc0, {0x5059de0, 0xc0010109f0}, 0xc000f6d600, {0x5050b70, 0xc0014e9650}, 0xc000ffad80)
	/work/core/pkg/resourcehandler/k8sresources.go:148 +0xbd5
github.com/kubescape/kubescape/v3/core/pkg/resourcehandler.CollectResources({0x5059de0, 0xc0010109c0}, {0x5050ae0, 0xc001b36fc0}, {0x0?, 0xc00158cd01?, 0xc001020438?}, 0xc000f6d600, {0x5050b70, 0xc0014e9650}, ...)
	/work/core/pkg/resourcehandler/handlerpullresources.go:29 +0x1b5
github.com/kubescape/kubescape/v3/core/core.(*Kubescape).Scan(0xc000f80840?, {0x5059de0?, 0xc000fad110}, 0xc000ffad80)
	/work/core/core/scan.go:172 +0x865
github.com/kubescape/kubescape/v3/httphandler/handlerequests/v1.scan({0x5059de0, 0xc000face70}, 0xc000ffad80, {0xc000198a20, 0x24})
	/work/httphandler/handlerequests/v1/requestshandlerutils.go:77 +0xf85
github.com/kubescape/kubescape/v3/httphandler/handlerequests/v1.(*HTTPHandler).executeScan(0xc0001acb88, 0xc000fac5d0)
	/work/httphandler/handlerequests/v1/requestshandlerutils.go:32 +0x16a
github.com/kubescape/kubescape/v3/httphandler/handlerequests/v1.(*HTTPHandler).watchForScan(0xc0001acb88)
	/work/httphandler/handlerequests/v1/requestshandlerutils.go:57 +0x53
created by github.com/kubescape/kubescape/v3/httphandler/handlerequests/v1.NewHTTPHandler in goroutine 1
	/work/httphandler/handlerequests/v1/requestshandler.go:44 +0x12f