Added OpenAPI generator options generateApis and generateModels (#1953)

* Added OpenAPI generator options `generateApis` and `generateModels`

* Updated PR template

Author: CharlesDuboisSAP

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,5 +1,3 @@
 ## What Has Changed?
 
 Explain what you are changing and why, if it isn't obvious from the diff.
-
-**If you are working on the Java v4 docs, remember to also apply the changes to v5**

docs-java/features/rest/generate-rest-client.mdx

@@ -212,6 +212,8 @@ The complete list of available parameters with their description is as follows:
 | `<outputDirectory>`            |     -      |   Yes    | Output directory for generated sources                                                                                                                                                                                                                                                                                                                                          |
 | `<apiPackage>`                 |     -      |   Yes    | Package name for the generated API classes                                                                                                                                                                                                                                                                                                                                      |
 | `<modelPackage>`               |     -      |   Yes    | Package name for the generated Model classes                                                                                                                                                                                                                                                                                                                                    |
+| `<generateApis>`               |   `True`   |    No    | Determines whether to generate API classes                                                                                                                                                                                                                                                                                                                                      |
+| `<generateModels>`             |   `True`   |    No    | Determines whether to generate Model classes                                                                                                                                                                                                                                                                                                                                    |
 | `<deleteOutputDirectory>`      |  `False`   |    No    | Determines whether to delete the output directory before running the generator                                                                                                                                                                                                                                                                                                  |
 | `<apiMaturity>`                | `released` |    No    | Defines the maturity of the OpenAPI for which Java classes are generated. Possible values are `released` and `beta`. Please note if you define it as `beta` then [@Beta annotations](https://www.javadoc.io/doc/com.google.guava/guava/latest/com/google/common/annotations/Beta.html) are added to the generated classes which indicate that they are in an experimental state |
 | `<compileScope>`               |   `NONE`   |    No    | Adds the generated sources to the compilation or test phase. Respective values are `COMPILE` and `TEST_COMPILE`                                                                                                                                                                                                                                                                 |