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/HasOnlyReadOnly.md

@@ -0,0 +1,10 @@
+# OpenApiPetstore.HasOnlyReadOnly
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**bar** | **String** |  | [optional] [readonly] 
+**foo** | **String** |  | [optional] [readonly] 
+
+