Combine existing defaults configuration into one mode switch

[slonka]

Description

Right now we have 4 switches (skipMeshCreation, skipTenantResources, createMeshRoutingResources, skipHostnameGenerators).

Following the MADR we decided to combine 4 switches to skip different resources into one mode option.

Suggested mode value:

I suggest we have the following values for mode:

• None (prod/IaC use case)
• All - default - (demo use case)

Because for serious use cases (prod, IaC) you want to track things manually in git and for demo you want to skip repeating the same things.