Support GraphQL 4.0

[esfomeado]

• Added support for GraphQL Plugin 4.0
• Moved to Java 17
• Fix some deprecations
• Cleanup

[srinivasankavitha]

Looks like you'll also need to update the build environment to use JDK 17 since tests are failing: https://github.com/Netflix/dgs-intellij-plugin/blob/main/.github/workflows/build.yml#L51