chore(vpcv2): set repo to private false in package json (#31316)

### Issue # (if applicable)

Closes .

### Reason for this change

vpcv2 is released and should no longer be flagged as private repo

### Description of changes

set private:false in package.json

### Description of how you validated changes

yarn build

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk/aws-ec2-alpha/.npmignore

@@ -26,3 +26,5 @@ jest.config.js
 junit.xml
 !*.lit.ts
 **/*.snapshot
+
+test/

packages/@aws-cdk/aws-ec2-alpha/README.md

@@ -1,17 +1,21 @@
 # Amazon VpcV2 Construct Library
-
 <!--BEGIN STABILITY BANNER-->
 
 ---
 
 ![cdk-constructs: Experimental](https://img.shields.io/badge/cdk--constructs-experimental-important.svg?style=for-the-badge)
 
-> The APIs of higher level constructs in this module are experimental and under active development. They are subject to non-backward compatible changes or removal in any future version. These are not subject to the [Semantic Versioning](https://semver.org/) model and breaking changes will be announced in the release notes. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.
+> The APIs of higher level constructs in this module are experimental and under active development.
+> They are subject to non-backward compatible changes or removal in any future version. These are
+> not subject to the [Semantic Versioning](https://semver.org/) model and breaking changes will be
+> announced in the release notes. This means that while you may use them, you may need to update
+> your source code when upgrading to a newer version of this package.
 
 ---
 
 <!--END STABILITY BANNER-->
 
+
 ## VpcV2
 
 `VpcV2` is a re-write of the [`ec2.Vpc`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.Vpc.html) construct. This new construct enables higher level of customization

packages/@aws-cdk/aws-ec2-alpha/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@aws-cdk/aws-ec2-alpha",
-  "private": true,
+  "private": false,
   "version": "0.0.0",
   "description": "The CDK construct library for VPC V2",
   "main": "lib/index.js",
@@ -103,5 +103,8 @@
     "env": {
       "AWSLINT_BASE_CONSTRUCT": true
     }
+  },
+  "publishConfig": {
+    "tag": "latest"
   }
 }