[CELEBORN-1607] Enable useEnumCaseInsensitive for openapi-generator

[turboFei]

What changes were proposed in this pull request?

Enable useEnumCaseInsensitive for openapi-generator.
And then in celeborn server end, the enum will be mapped to celeborn internal WorkerEventType.

Why are the changes needed?

I met exception when sending worker event with openapi sdk.

Exception in thread "main" ApiException{code=400, responseHeaders={Server=[Jetty(9.4.52.v20230823)], Content-Length=[491], Date=[Fri, 20 Sep 2024 23:50:27 GMT], Content-Type=[text/plain]}, responseBody='Cannot deserialize value of type `org.apache.celeborn.rest.v1.model.SendWorkerEventRequest$EventTypeEnum` from String "DecommissionThenIdle": not one of the values accepted for Enum class: [DECOMMISSION_THEN_IDLE, GRACEFUL, NONE, DECOMMISSION, IMMEDIATELY, RECOMMISSION]
 at [Source: (org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream); line: 1, column: 14] (through reference chain: org.apache.celeborn.rest.v1.model.SendWorkerEventRequest["eventType"])'}
    at org.apache.celeborn.rest.v1.master.invoker.ApiClient.processResponse(ApiClient.java:913)
    at org.apache.celeborn.rest.v1.master.invoker.ApiClient.invokeAPI(ApiClient.java:1000)
    at org.apache.celeborn.rest.v1.master.WorkerApi.sendWorkerEvent(WorkerApi.java:378)
    at org.apache.celeborn.rest.v1.master.WorkerApi.sendWorkerEvent(WorkerApi.java:334)
    at org.example.Main.main(Main.java:22) 

The testing code to re-produce:

package org.example;

import org.apache.celeborn.rest.v1.master.WorkerApi;
import org.apache.celeborn.rest.v1.master.invoker.ApiClient;
import org.apache.celeborn.rest.v1.model.ExcludeWorkerRequest;
import org.apache.celeborn.rest.v1.model.SendWorkerEventRequest;
import org.apache.celeborn.rest.v1.model.WorkerId;

public class Main {
    public static void main(String[] args) throws Exception {

        String cmUrl = "http://localhost:9098";
        WorkerApi workerApi = new WorkerApi(new ApiClient().setBasePath(cmUrl));
        workerApi.excludeWorker(new ExcludeWorkerRequest()
                .addAddItem(new WorkerId()
                        .host("localhost")
                        .rpcPort(1)
                        .pushPort(2)
                        .fetchPort(3)
                        .replicatePort(4)));
        workerApi.sendWorkerEvent(new SendWorkerEventRequest()
                        .addWorkersItem(new WorkerId()
                                .host("127.0.0.1")
                                .rpcPort(56116)
                                .pushPort(56117)
                                .fetchPort(56119)
                                .replicatePort(56118))
                .eventType(SendWorkerEventRequest.EventTypeEnum.DECOMMISSION_THEN_IDLE));
    }
}

Seems because for the EventTypeEnum, the name and value not the same and then cause this issue.

Not sure why the UT passed, but the integration testing failed.

For EventTypeEnum, because its value is case sensitive, so we meet this issue.

celeborn/openapi/openapi-client/src/main/java/org/apache/celeborn/rest/v1/model/SendWorkerEventRequest.java

Lines 47 to 83 in 8734d16

	public enum EventTypeEnum {
	IMMEDIATELY("Immediately"),
	DECOMMISSION("Decommission"),
	DECOMMISSION_THEN_IDLE("DecommissionThenIdle"),
	GRACEFUL("Graceful"),
	RECOMMISSION("Recommission"),
	NONE("None");
	private String value;
	EventTypeEnum(String value) {
	this.value = value;
	}
	@JsonValue
	public String getValue() {
	return value;
	}
	@Override
	public String toString() {
	return String.valueOf(value);
	}
	@JsonCreator
	public static EventTypeEnum fromValue(String value) {
	for (EventTypeEnum b : EventTypeEnum.values()) {
	if (b.value.equals(value)) {
	return b;
	}
	}
	throw new IllegalArgumentException("Unexpected value '" + value + "'");

Related issue in jersey end I think, eclipse-ee4j/jersey#5288

In this PR, useEnumCaseInsensitive is enabled for openapi-generator.

Does this PR introduce any user-facing change?

No, there is not user facing change and this SDK has not been released yet.

How was this patch tested?

Existing UT and Integration testing.

[turboFei]

cc @pan3793 @cxzl25 @cfmcgrady

[FMX]

LGTM. Thanks. Merged into main(v0.6.0).