Lack of support in network-security-rule for multiple prefixes. gap from the providers' feature/capability.

[aluevano]

The network-security-rule doesn't implement the provider's source_address_prefixes property.
If multiple source addresses are needed, the current release of the module fails because it supports only one address.

A simple boolean logic could enable the feature in the module.

### Tasks
- [ ] https://github.com/Azure/azure-data-labs-modules/pull/247

[murggu]

Thanks @aluevano - thanks for the feedback. You okay to create a PR for this?