fix(ama-sdk-schematics): subentry package.json files exports (#3095)

fix(ama-sdk-schematics): subentry package.json files exports

## Related issues

<!--
Please make sure to follow the [contribution
guidelines](https://github.com/amadeus-digital/Otter/blob/main/CONTRIBUTING.md)
-->

*- No issue associated -*

<!-- * 🐛 Fix #issue -->
<!-- * 🐛 Fix resolves #issue -->
<!-- * 🚀 Feature #issue -->
<!-- * 🚀 Feature resolves #issue -->
<!-- *  Pull Request #issue -->

Author: kpanot

packages/@ama-sdk/schematics/schematics/typescript/shell/templates/base/src/fixtures/jest/package.json

@@ -2,9 +2,7 @@
   "name": "<% if (projectName) { %>@<%=projectName%>/<% } %><%=projectPackageName%>/jest",
   "main": "../../cjs/api/fixtures.jest.js",
   "module": "../../esm2020/api/fixtures.jest.js",
-  "es2020": "../../esm2020/api/fixtures.jest.js",
-  "esm2020": "../../esm2020/api/fixtures.jest.js",
   "node": "../../cjs/api/fixtures.jest.js",
   "default": "../../esm2020/api/fixtures.jest.js",
-  "typings": "./index.d.ts"
+  "types": "./index.d.ts"
 }

packages/@ama-sdk/schematics/schematics/typescript/shell/templates/base/src/helpers/package.json

@@ -2,9 +2,7 @@
   "name": "<% if (projectName) { %>@<%=projectName%>/<% } %><%=projectPackageName%>/helpers",
   "main": "../cjs/helpers/index.js",
   "module": "../esm2020/helpers/index.js",
-  "es2020": "../esm2020/helpers/index.js",
-  "esm2020": "../esm2020/helpers/index.js",
   "node": "../cjs/helpers/index.js",
   "default": "../esm2020/helpers/index.js",
-  "typings": "./index.d.ts"
+  "types": "./index.d.ts"
 }

packages/@ama-sdk/schematics/schematics/typescript/shell/templates/base/src/spec/package.json

@@ -2,9 +2,7 @@
   "name": "<% if (projectName) { %>@<%=projectName%>/<% } %><%=projectPackageName%>/spec",
   "main": "../cjs/spec/index.js",
   "module": "../esm2020/spec/index.js",
-  "es2020": "../esm2020/spec/index.js",
-  "esm2020": "../esm2020/spec/index.js",
   "node": "../cjs/spec/index.js",
   "default": "../esm2020/spec/index.js",
-  "typings": "./index.d.ts"
+  "types": "./index.d.ts"
 }