[BUG] datadog-cluster-agent crashes with kube-state-metrics

[hameno]

Agent Environment
7.46.0 (installed via Helm 3.33.10)

Describe what happened:
datadog-cluster-agent crashes with kubeStateMetricsCore enabled.

2023-08-20T10:18:06.940436413Z panic: runtime error: invalid memory address or nil pointer dereference [recovered]
2023-08-20T10:18:06.940472884Z 	panic: runtime error: invalid memory address or nil pointer dereference
2023-08-20T10:18:06.940481134Z [signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0x2d00e9c]
2023-08-20T10:18:06.940483327Z 
2023-08-20T10:18:06.940485816Z goroutine 631 [running]:
2023-08-20T10:18:06.940487716Z k8s.io/apimachinery/pkg/util/runtime.HandleCrash({0x0, 0x0, 0x2540be400?})
2023-08-20T10:18:06.940489781Z 	/go/pkg/mod/k8s.io/apimachinery@v0.23.15/pkg/util/runtime/runtime.go:55 +0xd7
2023-08-20T10:18:06.940491778Z 
panic({0x333a760, 0x5fe0a80})
2023-08-20T10:18:06.940493861Z 	/goroot/src/runtime/panic.go:884 +0x212
2023-08-20T10:18:06.940495644Z k8s.io/apimachinery/pkg/api/resource.(*Quantity).AsInt64(...)
2023-08-20T10:18:06.940497781Z 	/go/pkg/mod/k8s.io/apimachinery@v0.23.15/pkg/api/resource/quantity.go:469
2023-08-20T10:18:06.940501501Z github.com/DataDog/datadog-agent/pkg/collector/corechecks/cluster/ksm/customresources.(*hpav2Factory).MetricFamilyGenerators.func5(0xc001978940)
2023-08-20T10:18:06.940504741Z 	/go/src/github.com/DataDog/datadog-agent/pkg/collector/corechecks/cluster/ksm/customresources/hpa.go:165 +0x25c
2023-08-20T10:18:06.940506887Z github.com/DataDog/datadog-agent/pkg/collector/corechecks/cluster/ksm/customresources.wrapHPAFunc.func1({0x38525e0?, 0xc001978940})
2023-08-20T10:18:06.940508555Z 	/go/src/github.com/DataDog/datadog-agent/pkg/collector/corechecks/cluster/ksm/customresources/hpa.go:379 +0x5a
2023-08-20T10:18:06.940510333Z k8s.io/kube-state-metrics/v2/pkg/metric_generator.(*FamilyGenerator).Generate(...)
2023-08-20T10:18:06.940512515Z 	/go/pkg/mod/github.com/datadog/kube-state-metrics/v2@v2.2.2-0.20230217083638-a9a9c0ff16f4/pkg/metric_generator/generator.go:77
2023-08-20T10:18:06.940534501Z k8s.io/kube-state-metrics/v2/pkg/metric_generator.ComposeMetricGenFuncs.func1({0x38525e0, 0xc001978940})
2023-08-20T10:18:06.940536597Z 	/go/pkg/mod/github.com/datadog/kube-state-metrics/v2@v2.2.2-0.20230217083638-a9a9c0ff16f4/pkg/metric_generator/generator.go:123 +0xd8
2023-08-20T10:18:06.940538331Z github.com/DataDog/datadog-agent/pkg/kubestatemetrics/store.(*MetricsStore).Add(0xc000f41cc0, {0x38525e0, 0xc001978940})
2023-08-20T10:18:06.940540010Z 	/go/src/github.com/DataDog/datadog-agent/pkg/kubestatemetrics/store/store.go:84 +0x79
2023-08-20T10:18:06.940542093Z github.com/DataDog/datadog-agent/pkg/kubestatemetrics/store.(*MetricsStore).Replace(0xc00153c460?, {0xc0004d1500?, 0x35, 0xc00153c438?}, {0xc13097f7b71d5f59?, 0x25f8c216?})
2023-08-20T10:18:06.940544447Z 	/go/src/github.com/DataDog/datadog-agent
+0x68
2023-08-20T10:18:06.940546101Z k8s.io/client-go/tools/cache.(*Reflector).syncWith(0xc0010b0700, {0xc00013f500, 0x35, 0x0?}, {0xc001731e90, 0x9})
2023-08-20T10:18:06.940547756Z 	/go/pkg/mod/k8s.io/client-go@v0.23.15/tools/cache/reflector.go:456 +0x98
2023-08-20T10:18:06.940549388Z k8s.io/client-go/tools/cache.(*Reflector).ListAndWatch.func1(0xc0010b0700, 0xc00153c360, 0xc000f345a0, 0xc0011cfdb0)
2023-08-20T10:18:06.940550968Z 	/go/pkg/mod/k8s.io/client-go@v0.23.15/tools/cache/reflector.go:354 +0x794
2023-08-20T10:18:06.940552518Z k8s.io/client-go/tools/cache.(*Reflector).ListAndWatch(0xc0010b0700, 0xc000f345a0)
2023-08-20T10:18:06.940556912Z 	/go/pkg/mod/k8s.io/client-go@v0.23.15/tools/cache/reflector.go:361 +0x214
2023-08-20T10:18:06.940558670Z k8s.io/client-go/tools/cache.(*Reflector).Run.func1()
2023-08-20T10:18:06.940560271Z 	/go/pkg/mod/k8s.io/client-go@v0.23.15/tools/cache/reflector.go:221 +0x26
2023-08-20T10:18:06.940561821Z k8s.io/apimachinery/pkg/util/wait.BackoffUntil.func1(0xc000f264e0?)
2023-08-20T10:18:06.940563690Z 	/go/pkg/mod/k8s.io/apimachinery@v0.23.15/pkg/util/wait/wait.go:155 +0x3e
2023-08-20T10:18:06.940565345Z k8s.io/apimachinery/pkg/util/wait.BackoffUntil(0xc000408780?, {0x443e5c0, 0xc000f729b0}, 0x1, 0xc000f345a0)
2023-08-20T10:18:06.940569250Z 	/go/pkg/mod/k8s.io/apimachinery@v0.23.15/pkg/util/wait/wait.go:156 +0xb6
2023-08-20T10:18:06.940570887Z k8s.io/client-go/tools/cache.(*Reflector).Run(0xc0010b0700, 0xc000f345a0)
2023-08-20T10:18:06.940572397Z 	/go/pkg/mod/k8s.io/client-go@v0.23.15/tools/cache/reflector.go:220 +0x17d
2023-08-20T10:18:06.940574259Z created by github.com/DataDog/datadog-agent/pkg/kubestatemetrics/builder.(*Builder).startReflector
2023-08-20T10:18:06.940575800Z 	/go/src/github.com/DataDog/datadog-agent/pkg/kubestatemetrics/builder/builder.go:237 +0xed

Describe what you expected:
no crashes

Steps to reproduce the issue:
Install EKS 1.27, with rancher-monitoring 102.0.1+up40.1.2 and Datadog

Additional environment details (Operating System, Cloud provider, etc):
EKS 1.27

[davidor]

This should be fixed by the changes introduced in this PR: #18580

The bug triggered when there are HPA objects in the cluster with metrics of type "Object" and "AverageValue" target type