### What happened?

In `garbagecollector.GetDeletableResources()` if `discoveryClient.ServerPreferredResources()` fails with a lookup error, we log something like the following due to json.Marshal() refusing to marshal a struct type.
```
garbagecollector.go:835] "failed to discover some groups" groups="<internal error: json: unsupported type: map[schema.GroupVersion]error>"
```

### What did you expect to happen?

Get a usable error message, like:
```
"failed to discover some groups" groups="unable to retrieve the complete list of server APIs: metrics.k8s.io/v1beta1: stale GroupVersion discovery: metrics.k8s.io/v1beta1"
```


### How can we reproduce it (as minimally and precisely as possible)?

Encounter a condition that causes a lookup failure. Mine was with a brand-new k3s install.

### Anything else we need to know?

_No response_

### Kubernetes version

<details>

```console
$ kubectl version
Client Version: v1.29.3-k3s1
Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3
Server Version: v1.29.3-k3s1

```

</details>


### Cloud provider

N/A

### OS version

<details>

```console
# On Linux:
$ cat /etc/os-release
NAME="SLE Micro"
VERSION="5.5"
VERSION_ID="5.5"
PRETTY_NAME="SUSE Linux Enterprise Micro 5.5"
ID="sle-micro"
ID_LIKE="suse"
ANSI_COLOR="0;32"
CPE_NAME="cpe:/o:suse:sle-micro:5.5"

$ uname -a
Linux work-router.domain 5.14.21-150500.55.52-default #1 SMP PREEMPT_DYNAMIC Tue Mar 5 16:53:41 UTC 2024 (a62851f) x86_64 x86_64 x86_64 GNU/Linux
```

</details>


### Install tools

<details>

</details>


### Container runtime (CRI) and version (if applicable)

<details>

</details>


### Related plugins (CNI, CSI, ...) and versions (if applicable)

<details>

</details>

garbagecollector.GetDeletableResources logs json encoding error instead of actual error
This is a GitHub Issue
repo:kubernetes
owner:kubernetes
Title : garbagecollector.GetDeletableResources logs json encoding error instead of actual error
Issue date:

--- start body ---
### What happened?

In `garbagecollector.GetDeletableResources()` if `discoveryClient.ServerPreferredResources()` fails with a lookup error, we log something like the following due to json.Marshal() refusing to marshal a struct type.
```
garbagecollector.go:835] "failed to discover some groups" groups="<internal error: json: unsupported type: map[schema.GroupVersion]error>"
```

### What did you expect to happen?

Get a usable error message, like:
```
"failed to discover some groups" groups="unable to retrieve the complete list of server APIs: metrics.k8s.io/v1beta1: stale GroupVersion discovery: metrics.k8s.io/v1beta1"
```


### How can we reproduce it (as minimally and precisely as possible)?

Encounter a condition that causes a lookup failure. Mine was with a brand-new k3s install.

### Anything else we need to know?

_No response_

### Kubernetes version

<details>

```console
$ kubectl version
Client Version: v1.29.3-k3s1
Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3
Server Version: v1.29.3-k3s1

```

</details>


### Cloud provider

N/A

### OS version

<details>

```console
# On Linux:
$ cat /etc/os-release
NAME="SLE Micro"
VERSION="5.5"
VERSION_ID="5.5"
PRETTY_NAME="SUSE Linux Enterprise Micro 5.5"
ID="sle-micro"
ID_LIKE="suse"
ANSI_COLOR="0;32"
CPE_NAME="cpe:/o:suse:sle-micro:5.5"

$ uname -a
Linux work-router.domain 5.14.21-150500.55.52-default #1 SMP PREEMPT_DYNAMIC Tue Mar 5 16:53:41 UTC 2024 (a62851f) x86_64 x86_64 x86_64 GNU/Linux
```

</details>


### Install tools

<details>

</details>


### Container runtime (CRI) and version (if applicable)

<details>

</details>


### Related plugins (CNI, CSI, ...) and versions (if applicable)

<details>

</details>

--- end body ---
