subnet removed and changed source

[nileshgadgi]

what

• Removed subnet block from vnet resource and vnet_remote block.
• Changed the source and version of vnet and vnet_remote module (clouddrove/virtual-network/azure to clouddrove/vnet/azure).

why

• We are going to remove clouddrove/virtual-network/azure module, so there is changes to get error.
• We have separate modules to include a subnet in the resource so there is no need to use a subnet block in vnet resource block.
• Removed subnet block because it was giving an error while using clouddrove/vnet/azure source in vnet resource block.

references

• Took source and version information from clouddrove's official github page