Gradle plugin does not generate working gradle build for java generator with rest-assured library

Description

Using gradle open api generator to generate java client code using the rest-assured library.
The generated pom (maven build) is ok, but the generated gradle build (build.gradle) is missing a dependency version, the : jakarta_annotation_version

So running the generated gradle build, e.g: ./gradlew build fails

pom extract which works fine:

        <dependency>
            <groupId>jakarta.annotation</groupId>
            <artifactId>jakarta.annotation-api</artifactId>
            <version>${jakarta-annotation-version}</version>
            <scope>provided</scope>
        </dependency>
        
        <jakarta-annotation-version>1.3.5</jakarta-annotation-version>

build.gradle extract :

dependencies {
    implementation "io.swagger:swagger-annotations:$swagger_annotations_version"
    implementation "com.google.code.findbugs:jsr305:3.0.2"
    implementation "io.rest-assured:rest-assured:$rest_assured_version"
    implementation "io.gsonfire:gson-fire:$gson_fire_version"
    implementation 'com.google.code.gson:gson:$gson_version'
    implementation "com.squareup.okio:okio:$okio_version"
    implementation "jakarta.annotation:jakarta.annotation-api:$jakarta_annotation_version"
    testImplementation "junit:junit:$junit_version"
}

but the ext does not contain any jakarta version and looks like:

ext {
    swagger_annotations_version = "1.6.6"
    rest_assured_version = "4.5.1"
    junit_version = "4.13.2"
    gson_version = "2.8.9"
    gson_fire_version = "1.8.5"
    okio_version = "1.17.5"
}

So gradle build fails with

./gradlew compile

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/jonas.bryllert/jonas/work/projects/message-template-service/build/generated/openapiclient/build.gradle' line: 115

* What went wrong:
A problem occurred evaluating root project 'message-template-openapi-restassured-client'.
> Could not get unknown property 'jakarta_annotation_version' for object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.

openapi-generator version

Gradle plugin:
id("org.openapi.generator") version "6.0.0"

OpenAPI declaration file content or url

Command line used for generation

Using the gradle plugin as above. Here is the snippet from the gradle build that creates the task for building the java openapi client:

tasks.register<org.openapitools.generator.gradle.plugin.tasks.GenerateTask>("generateOpenApiClientSource") {
	inputSpec.set(apiSpec)
	generatorName.set("java")
	outputDir.set(generatedClientSourcesDir)
	groupId.set("xxxxxx")
	id.set("xxxxxx-openapi-restassured-client")
	version.set("$gitVersion")
	packageName.set("xxxxxx.openapi.client")
	apiPackage.set("xxxxxx.openapi.client.api")
	modelPackage.set("xxxxxx.openapi.client.model")
	library.set("rest-assured")
}

Steps to reproduce

Use any sample openapi yaml file

Related issues/PRs

Suggest a fix/enhancement

Compare the generated build.gradle dependency declarations with the working generated pom, focusing on the missing jakarta_annotation_version entry. Reproduce the failure with ./gradlew build or ./gradlew compile; done means the generated Gradle project defines the Jakarta annotation version and builds successfully.