[Bug] Cannot set persistent volume claim storage size for FE

### Search before asking

- [X] I had searched in the [issues](https://github.com/apache/doris-operator/issues?q=is%3Aissue) and found no similar issues.

### Version

24.1.0

### What's Wrong?

Currently cannot set the persistent volume claim storage size for FE as any value configured other than 100Gi get's set to 100Gi.

```yaml
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apiVersion: disaggregated.cluster.doris.com/v1
kind: DorisDisaggregatedCluster
metadata:
name: test-disaggregated-cluster
spec:
metaService:
image: selectdb/doris.ms-ubuntu:3.0.2
configMaps:
- name: ms-configmap
fdb:
# address: ${fdb_endpoint}
configMapNamespaceName:
name: ${fdb-configmap}
namespace: ${fdb-namespace}
feSpec:
replicas: 2
image: selectdb/doris.fe-ubuntu:3.0.2
persistentVolume:
# logNotStore: true
persistentVolumeClaimSpec:
# storageClassName: ${storageclass_name}
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi
computeGroups:
- uniqueId: cg1
replicas: 3
image: selectdb/doris.be-ubuntu:3.0.2
persistentVolume:
# logNotStore: true
persistentVolumeClaimSpec:
# storageClassName: ${storageclass_name}
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 100Gi
- uniqueId: cg2
replicas: 3
image: selectdb/doris.be-ubuntu:3.0.2
persistentVolume:
# logNotStore: true
persistentVolumeClaimSpec:
# storageClassName: ${storageclass_name}
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 100Gi
```

10Gi gets interpreted as 100Gi.
```
feSpec:
replicas: 2
image: selectdb/doris.fe-ubuntu:3.0.2
persistentVolume:
# logNotStore: true
persistentVolumeClaimSpec:
# storageClassName: ${storageclass_name}
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 100Gi
```

### What You Expected?

Expect storage size to match configured value of persistent volume claim template.

### How to Reproduce?

_No response_

### Anything Else?

_No response_

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)