Removing Effect1 parameter and usage. Updated parameter value

[SebastianClaesson]

Overview/Summary

Pull request fixes;

• Effect1 - Parameter #1919

The Azure Policy Set for "deploy-private-dns-zones" contains a parameter called effect1 which is used for only these azure policy definitions;

DINE-Private-DNS-Azure-EventGridTopics
DINE-Private-DNS-Azure-IoTHubs
DINE-Private-DNS-Azure-EventGridDomains
The parameter should be removed and the parameter effect should be used instead across these three policy definitions.

• Eventgrid - Topic - Private dns zone policy #1920

However the default value of the parameter dnsZoneNames with key 'azureEventGridTopicsPrivateDnsZoneId' is
"privatelink.eventgrid.azure.net"
Reference; azureEventGridTopicsPrivateDnsZoneId

According to the Event grid documentations the expected DNS zone should be in the following format;
..privatelink.eventgrid.azure.net

Reference; https://learn.microsoft.com/en-us/azure/event-grid/network-security#dns-changes-for-private-endpoints

This PR fixes/adds/changes/removes

1. Removes Effect1 parameter (Effect1 - Parameter #1919)
2. Changes that the three policies that utilized Effect1 now uses Effect parameter (Effect1 - Parameter #1919)
3. Updated the parameter for eventgrid topic and domainName to contain regionName (Eventgrid - Topic - Private dns zone policy #1920)

Breaking Changes

1. Removed a parameter called "Effect1" which will lead to that the policySet needs to be reprovisioned.

Testing Evidence

Using EnterprisePolicyAsCode this is the output; (Proving that a redeploy of the initiative is required)

The logic works after update (However I do not have any topics or domain names to test on)

As part of this Pull Request I have

• Checked for duplicate Pull Requests
• Associated it with relevant issues, for tracking and closure.
• Ensured my code/branch is up-to-date with the latest changes in the main branch
• Performed testing and provided evidence.
• Ensured contribution guidance is followed.
• Updated relevant and associated documentation.
• Updated the "What's New?" wiki page (located: /docs/wiki/whats-new.md)