CKV_AWS_88 incorrectly describes violating heuristic

## Description

### Document
https://github.com/hlxsites/prisma-cloud-docs/blob/main/docs/en/enterprise-edition/policy-reference/aws-policies/public-policies/public-12.adoc

### Assertion
Currently the documentation for `CKV_AWS_88` is incorrect, as the title labels the issue as
> AWS EC2 instances with public IP and associated with security groups have Internet access

There is no heuristic as far as I can tell that is looking for the instances to have associated security groups.

Everywhere else in the original bridgecrew and checkov documentation, it explicitly only mentions an instance "having a public ip associated" and doesn't involve security groups.

If the intention is to detect based off of whether or not an EC2 instance has a public IP address/public resolvable DNS **and** is reachable from the internet through a security group open to `0.0.0.0/0` then the detection heuristic in the script is incorrect.

### Referenced detection code
The heuristic detection code here: https://github.com/bridgecrewio/checkov/blob/main/checkov/terraform/checks/resource/aws/EC2PublicIP.py

It's explicitly _only_ looking for public IP address assignment arguments, and not whether or not an associated security group has internet access or not.