feature request: allow disabling generation of igw

[gwvandesteeg]

Use cases:

1. Internet traffic is routed via an Egress VPC via a transit gateway (for outbound content filtering), but there are still the distinction of a "public" and a "private" network inside the VPC.
2. Alternatively the traffic for the "public" network is routed via a DirectConnect (great way of bringing publicly routed IPs into your VPC onto the EC2 hosts without NAT involved).

Solution:
Leave the default behaviour as is but add an additional check to the igw creation to also check for disable_igw_creation (default of false).

[DrFaust92]

Hey @gwvandesteeg , im looking into add support for this feature. is this also relevant for the egress only igw?

[github-actions]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues. If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.