Enum JsonCreator without mode=DELEGATING failed when using jackson >= 2.11

Description

Currently when we have enum class generated, Deserialize will failed, error:
threw exception [Request processing failed; nested exception is feign.codec.DecodeException: Error while extracting response for type [x.y.z.a.b.c.class] and content type [application/vnd.x.y.z.v1+json]; nested exception is org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Input mismatch reading Enum x.y.z.a.b.c.enum: properties-based @JsonCreator ([method x.y.z.a.b.c.enum#fromValue(class name)]) expects JSON Object (JsonToken.START_OBJECT), got JsonToken.VALUE_STRING; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Input mismatch reading Enum x.y.z.a.b.c.enum: properties-based @JsonCreator ([method x.y.z.a.b.c.enum#fromValue(x.y.z.a.b.c.enum)]) expects JSON Object (JsonToken.START_OBJECT), got JsonToken.VALUE_STRING

this one can refer to https://github.com/FasterXML/jackson-module-kotlin/issues/336

Swagger-codegen version

3.0.25

Swagger declaration file content or url

Command line used for generation

Steps to reproduce

any class that contain enum and called Deserialize error will throw

Related issues/PRs

Suggest a fix/enhancement

the simple fix will be change the mustache
https://github.com/swagger-api/swagger-codegen/blob/master/modules/swagger-codegen/src/main/resources/Java/modelEnum.mustache
change
{{#jackson}}
@JsonCreator
{{/jackson}}
public static {{#datatypeWithEnum}}{{{.}}}{{/datatypeWithEnum}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}
.......
to
@JsonCreator(mode = JsonCreator.Mode.DELEGATING)
{{/jackson}}
public static {{#datatypeWithEnum}}{{{.}}}{{/datatypeWithEnum}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}

Start with modules/swagger-codegen/src/main/resources/Java/modelEnum.mustache and review the enum creator template described in the issue. Verify the generated enum can deserialize a JSON string with Jackson 2.11 or newer; the issue is done when the generated creator uses the requested delegating mode.