[TS] disable lint in index file

We disable lint in typescript-fetch in this PR
OpenAPITools#4110

But we doesn't disable index.ts files so we'll get error with [no-cycle](https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-cycle.md) rule.

- index.ts [import all classFiles](https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator/src/main/resources/typescript-fetch/models.index.mustache#L4) to exporting
- When model use another models (i.e. article model have user model as author), model import another model [using index.ts](https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator/src/main/resources/typescript-fetch/modelGeneric.mustache#L10)

So we need disable all generated file.

modules/openapi-generator/src/main/resources/typescript-fetch/apis.index.mustache

@@ -1,3 +1,5 @@
+/* tslint:disable */
+/* eslint-disable */
 {{#apiInfo}}
 {{#apis}}
 {{#operations}}

modules/openapi-generator/src/main/resources/typescript-fetch/index.mustache

@@ -1,3 +1,5 @@
+/* tslint:disable */
+/* eslint-disable */
 export * from './runtime';
 {{#apiInfo}}
 {{#apis.0}}

modules/openapi-generator/src/main/resources/typescript-fetch/models.index.mustache

@@ -1,3 +1,5 @@
+/* tslint:disable */
+/* eslint-disable */
 {{#models}}
 {{#model}}
 {{^withoutRuntimeChecks}}