Combine javascript and javascript-apollo generators (#13270)

* Combine javascript and javascript-apollo generator functionality

* Combine javascript and javascript-apollo templates

* update configs

* deprecate javascript-apollo generator

* bonus magic string deletion ✨

* update samples

* update generator docs

* fix: include .babelrc in apollo generation

* update samples

* update samples

* rename javascript-apollo to javascript-apollo-deprecated

* fix javascript apollo library template

Apollo library now uses the partial_model_generic template file from the ES6 library, as it includes many fixes and improvements (including handling models with ill-named attributes)

* update samples

* Create javascript-apollo-deprecated.md

* Updated javascript generator template's gitignore

Updates .gitignore with that from https://github.com/github/gitignore/blob/main/Node.gitignore

Main reason for the update is to ignore the 'dist' folder with compiled files by default.

* javascript generator: merge api_test template files

The only difference is that Apollo is not designed for browser, so having a "if(browser)" check is useless, but doesn't hurt.

* update docs

* cleanup

* avoid possible config clash

* update javascript-apollo sample

* update javascript-es6 sample

I kept the pom.xml from before

* update javascript-promise-es6 sample

kept pom.xml

* update samples

samples/client/petstore/javascript-apollo/docs/DefaultApi.md

@@ -0,0 +1,48 @@
+# OpenApiPetstore.DefaultApi
+
+All URIs are relative to *http://petstore.swagger.io:80/v2*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**fooGet**](DefaultApi.md#fooGet) | **GET** /foo | 
+
+
+
+## fooGet
+
+> FooGetDefaultResponse fooGet()
+
+
+
+### Example
+
+```javascript
+import OpenApiPetstore from 'open_api_petstore';
+
+let apiInstance = new OpenApiPetstore.DefaultApi();
+apiInstance.fooGet((error, data, response) => {
+  if (error) {
+    console.error(error);
+  } else {
+    console.log('API called successfully. Returned data: ' + data);
+  }
+});
+```
+
+### Parameters
+
+This endpoint does not need any parameter.
+
+### Return type
+
+[**FooGetDefaultResponse**](FooGetDefaultResponse.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: application/json
+