[JAVA] [SPRING] [PKMST] [MICRONAUT] XML wireformat: Fix Jackson useWrapping=false, JAXB+Jackson namespaces (#18870)

* Fix XML annotations on model properties (JavaSpring)

* generate JAXB annotations for attributes and elements

* generate wrapper annotations (JAXB and Jackson)

* use XML config from items for annotations of containers

* Add test for Jackson XML wrapper correctness

* Add additional test cases to cover all xml applications in spec

Test now covers all use cases described in
- https://web.archive.org/web/20240424203304/https://swagger.io/docs/specification/data-models/representing-xml/
- https://spec.openapis.org/oas/v3.0.0#xml-arrays

* Fix basename used instead of xmlName when items.xmlName is unset

See last example in spec: https://spec.openapis.org/oas/v3.0.0#xml-arrays

* Harmonize spacing between Annotation attribute name and value

* Refactor and group JAXB vs. Jackson XML annotations, only generate latter if enabled

This is in line with the way the class annotations in `xmlAnnotations.mustache`
are rendered – which only renders the `@Jackson`… xml annotations if
additionalProperty jackson is true.

Also reorder annotation attributes in the following order:
- localName/name
- namespace (optional)
- isAttribute/useWrapping (optional)

* Explicitly render `useWrapping = true` to @JacksonXmlElementWrapper

This was slightly inspired by @jzrebiec via PR #5371.

Wrapping is the default since Jackson 2.1 – so explicitly rendering
this will:
- make generated model work out-of-the-box in Jackson 2.0 for instance
- ensure the models still work if the local `XmlWrapper` was
  configured with `useXmlWrapper(false)`

* Move xml test spec to java resources folder (not spring specific)

* Make test class name match class-under-test

This makes discovery & cross-navigation in IDE easier.

* Add complete xml annotations test for Java generators

* Fix Java PKMST generator not generating @JacksonXmlElementWrapper

* Fix Java microprofile generator missing @JacksonXmlRootElement

* Fix Java microprofile generator not using wrapper annotations and namespaces

* Fix Java Micronaut Client creating invalid (unclosed) @XmlAttribute annotations

* Fix Micronaut Client using wrong localName for @JacksonXmlElementWrapper

* Fix Micronaut client rendering @JacksonXmlProperty annotation twice

* Make Java Micronaut render @JacksonXmlElementWrapper(useWrapping=false) for non-wrapped elements

* Fix Jackson element using `xml.name` when it should be `items.xml.name`

Closes #5989
Closes #3223
Relates to #9371

* Fix JAXB element using `baseName` instead of `xmlName` when items.xmlName is unset

* Remove XML generation debug output from templates

* Remove redundant newline between XML class annotations and class

Brings the SpringCodegen in line with other Java Codegen's

* Remove redundant newline between XML setter annotations and setter

* Fix multiline JavaDoc block indentation and format

* Simplify / condense xml annotation template into single lines

May look a bit more complex, but cuts out a lot of repetitiveness.
Also reorders annotation attributes in the following order:
- localName/name
- namespace (optional)
- isAttribute/useWrapping (optional)

* Harmonize spacing between Annotation attribute name and value

* Remove unused jackson_annotations partial

Was not referenced anywhere in java-helidon resources folder

---------

Co-authored-by: Christian Schuster <christian@dnup.de>

samples/client/petstore/java/restclient-nullable-arrays/src/main/java/org/openapitools/client/model/ByteArrayObject.java

@@ -64,10 +64,10 @@ public class ByteArrayObject {
     return this;
   }
 
-   /**
+  /**
    * byte array.
    * @return nullableArray
-  **/
+   */
   @jakarta.annotation.Nullable
   @JsonIgnore
 
@@ -97,10 +97,10 @@ public class ByteArrayObject {
     return this;
   }
 
-   /**
+  /**
    * byte array.
    * @return normalArray
-  **/
+   */
   @jakarta.annotation.Nullable
   @JsonProperty(JSON_PROPERTY_NORMAL_ARRAY)
   @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
@@ -122,10 +122,10 @@ public class ByteArrayObject {
     return this;
   }
 
-   /**
+  /**
    * Get nullableString
    * @return nullableString
-  **/
+   */
   @jakarta.annotation.Nullable
   @JsonIgnore
 
@@ -155,10 +155,10 @@ public class ByteArrayObject {
     return this;
   }
 
-   /**
+  /**
    * Get stringField
    * @return stringField
-  **/
+   */
   @jakarta.annotation.Nullable
   @JsonProperty(JSON_PROPERTY_STRING_FIELD)
   @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
@@ -180,10 +180,10 @@ public class ByteArrayObject {
     return this;
   }
 
-   /**
+  /**
    * Get intField
    * @return intField
-  **/
+   */
   @jakarta.annotation.Nullable
   @JsonProperty(JSON_PROPERTY_INT_FIELD)
   @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)