Inject defaults for certain attributes

[jsteinich]

Fixes #234
Fixes #223
Fixes #443

Simple default values injected during code generation based on fully qualified attribute name.
Currently not allowing users to specify their own defaults, but could expose through cdktf.json if that was desired.
Specifying individual attributes rather than whole block for a bit more flexibility, but could switch that.

[jsteinich]

@skorfmann Should I go ahead and other other known resources in the same manner?

[skorfmann]

Currently not allowing users to specify their own defaults, but could expose through cdktf.json if that was desired.

I think that's mostly a stop-gap solution, so not sure what users would need to inject here. It's certainly good enough for a first iteration.

Specifying individual attributes rather than whole block for a bit more flexibility, but could switch that.

Makes sense 👍

Should I go ahead and other other known resources in the same manner?

Yes, please :)

[github-actions]

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