[ACS44] cherry pick CLOUDSTACK-6255

[Gabor Apati-Nagy]

Hi Daan/Hugo,

Could you please cherry-pick the following commit?

commit 83e5ea9812cb57eb214ec9548671b0404914ae9b

CLOUDSTACK-6255

UI for supporting region level VPC, distributed routing enabled VPC and
stretched L2 neworks

Thanks,
Gabor