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/EnumTest.md

@@ -0,0 +1,64 @@
+# OpenApiPetstore.EnumTest
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**enumString** | **String** |  | [optional] 
+**enumStringRequired** | **String** |  | 
+**enumInteger** | **Number** |  | [optional] 
+**enumNumber** | **Number** |  | [optional] 
+**outerEnum** | [**OuterEnum**](OuterEnum.md) |  | [optional] 
+**outerEnumInteger** | [**OuterEnumInteger**](OuterEnumInteger.md) |  | [optional] 
+**outerEnumDefaultValue** | [**OuterEnumDefaultValue**](OuterEnumDefaultValue.md) |  | [optional] 
+**outerEnumIntegerDefaultValue** | [**OuterEnumIntegerDefaultValue**](OuterEnumIntegerDefaultValue.md) |  | [optional] 
+
+
+
+## Enum: EnumStringEnum
+
+
+* `UPPER` (value: `"UPPER"`)
+
+* `lower` (value: `"lower"`)
+
+* `empty` (value: `""`)
+
+
+
+
+
+## Enum: EnumStringRequiredEnum
+
+
+* `UPPER` (value: `"UPPER"`)
+
+* `lower` (value: `"lower"`)
+
+* `empty` (value: `""`)
+
+
+
+
+
+## Enum: EnumIntegerEnum
+
+
+* `1` (value: `1`)
+
+* `-1` (value: `-1`)
+
+
+
+
+
+## Enum: EnumNumberEnum
+
+
+* `1.1` (value: `1.1`)
+
+* `-1.2` (value: `-1.2`)
+
+
+
+