Generate fluid-related clients to facilitate go client calls and watch-related resources

[lgy1027]

Add related clients for easy operation. If you make changes and need to regenerate, just execute the script. Some modifications need to be made in the API structure.

Example：
`import (
"context"
"fmt"
"github.com/fluid-cloudnative/fluid/api/v1alpha1"
"github.com/fluid-cloudnative/fluid/pkg/apis/client/clientset/versioned"
"github.com/fluid-cloudnative/fluid/pkg/apis/client/informers/externalversions"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/clientcmd"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
"time"
)

const defaultResync = 600 * time.Second

var (
finalizerName = "data.fluid.io/finalizer"
)

func main() {
config, err := clientcmd.BuildConfigFromFlags("", "config")
if err != nil {
panic(err)
}
config.QPS = 1e6
config.Burst = 1e6
client, err := versioned.NewForConfig(config)
if err != nil {
panic(err)
}
informerFactory := externalversions.NewSharedInformerFactory(client, defaultResync)

informer := informerFactory.Data().V1alpha1().Datasets().Informer()
lister := informerFactory.Data().V1alpha1().Datasets().Lister()

informer.AddEventHandlerWithResyncPeriod(cache.ResourceEventHandlerFuncs{
	AddFunc: func(obj interface{}) {
		dataset, ok := obj.(*v1alpha1.Dataset)
		if !ok {
			return
		}

		fmt.Println(dataset.Name)
	},

	DeleteFunc: func(obj interface{}) {
		dataset, ok := obj.(*v1alpha1.Dataset)
		if !ok {
			return
		}

		fmt.Println(dataset.DeletionTimestamp == nil)
	},
}, 0)

ch := make(chan struct{})
informerFactory.Start(ch)
informerFactory.WaitForCacheSync(ch)

list, err := lister.Datasets("default").List(labels.Everything())
if err != nil {
	panic(err)
}
fmt.Println(list)
ds := &v1alpha1.Dataset{
	ObjectMeta: metav1.ObjectMeta{
		Name:      "test",
		Namespace: "default",
	},
	Spec: v1alpha1.DatasetSpec{
		SharedOptions: map[string]string{
			"alluxio.underfs.s3.endpoint":            "http://127.0.0.1:32000",
			"alluxio.underfs.s3.disable.dns.buckets": "true",
			"alluxio.underfs.s3.inherit.acl":         "false",
		},
		SharedEncryptOptions: []v1alpha1.EncryptOption{
			{Name: "aws.accessKeyId", ValueFrom: v1alpha1.EncryptOptionSource{SecretKeyRef: v1alpha1.SecretKeySelector{Name: "minio", Key: "accessKeyId"}}},
			{Name: "aws.secretKey", ValueFrom: v1alpha1.EncryptOptionSource{SecretKeyRef: v1alpha1.SecretKeySelector{Name: "minio", Key: "secretKey"}}},
		},
		PlacementMode: v1alpha1.ShareMode,
		AccessModes: []corev1.PersistentVolumeAccessMode{
			corev1.ReadWriteMany,
		},
		Mounts: []v1alpha1.Mount{{
			MountPoint: "dataset://default/s3/test",
			Name:       "test",
		}},
	},
}
_, err = client.DataV1alpha1().Datasets(ds.Namespace).Create(context.Background(), ds, metav1.CreateOptions{})
if err != nil {
	panic(err)
}

ds, err = client.DataV1alpha1().Datasets(ds.Namespace).Get(context.Background(), ds.Name, metav1.GetOptions{})
if err != nil {
	panic(err)
}

if !controllerutil.ContainsFinalizer(ds, finalizerName) {
	controllerutil.AddFinalizer(ds, finalizerName)
}
_, err = client.DataV1alpha1().Datasets(ds.Namespace).Update(context.Background(), ds, metav1.UpdateOptions{})
if err != nil {
	panic(err)
}
propagationPolicy := metav1.DeletePropagationBackground
err = client.DataV1alpha1().Datasets(ds.Namespace).Delete(context.Background(), ds.Name, metav1.DeleteOptions{
	PropagationPolicy: &propagationPolicy,
})
if err != nil {
	panic(err)
}
<-ch

}`

[fluid-e2e-bot]

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[fluid-e2e-bot]

Hi @lgy1027. Thanks for your PR.

I'm waiting for a fluid-cloudnative member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Merging #3468 (3aec4bd) into master (208b672) will decrease coverage by 0.02%.
The diff coverage is 0.00%.

❗ Current head 3aec4bd differs from pull request most recent head 171ab4a. Consider uploading reports for the commit 171ab4a to get more accurate results

@@            Coverage Diff             @@
##           master    #3468      +/-   ##
==========================================
- Coverage   64.29%   64.28%   -0.02%     
==========================================
  Files         442      443       +1     
  Lines       26452    26454       +2     
==========================================
- Hits        17007    17005       -2     
- Misses       7440     7443       +3     
- Partials     2005     2006       +1     

Files Changed	Coverage Δ
api/v1alpha1/register.go	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

[cheyang]

/test fluid-e2e

[cheyang]

Fluid is built by controller runtime and code generation with kubebuilder. I'm wondering if this change can still be compatible with kubebuilder.

[lgy1027]

Fluid is built by controller runtime and code generation with kubebuilder. I'm wondering if this change can still be compatible with kubebuilder.

This modification is only to facilitate Go to operate fluid, and also uses code-generator to generate client-related code. In my opinion, it is not intrusive to the original code. As for the submitted script, I can actually delete it. I feel that the official https:// github.com/fluid-cloudnative/fluid/blob/master/docs/zh/dev/use_go_create_resource.md is a bit troublesome to operate, including resource watch