refactor(module/vnet_peering)!: module refactor and adjusted examples

[acelebanski]

Description

PR delivers changes for vnet_peering:

• README.md adjusted to new style with additional header file
• minimum Terraform version set to 1.3
• refactor variables:
  • descriptions
  • types with optionals
  • default values
  • validations
• simplify main.tf by removing not required try
• remove name generation logic from the module
• add terraform registry reference

Motivation and Context

#336

How Has This Been Tested?

I checked that module using "test_infrastructure" example.

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes if appropriate.
• All new and existing tests passed.

[FoSix]

👍
just this one space missing in the variables