Example KPT package with subpackages

[liamfallon]

This is an example demo package with two levels of subpackages, with the main package and all its subpackages deploying
separate deployments of nginx

The package has the following structure:

main--+--sub1--+--sub1sub1
      |        |
      |        +--sub1sub2
      |
      +--sub2--+--sub2sub1
               |
               +--sub2sub2

[liamfallon]

/assign @kispaljr @efiacor @Catalin-Stratulat-Ericsson @JamesMcDermott @kushnaidu @nagygergo

[Catalin-Stratulat-Ericsson]

looks good to me. will use this to debug #827 and add a test case using this package also.

[nephio-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Catalin-Stratulat-Ericsson, liamfallon

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [liamfallon]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[efiacor]

Would it be better to add this and any other "test" pkgs to the examples repo?
https://github.com/nephio-project/nephio-example-packages

I had planned to move some of the other test pkgs there too. ie. https://github.com/nephio-project/porch/blob/main/test/e2e/e2e_test.go#L90

[liamfallon]

Would it be better to add this and any other "test" pkgs to the examples repo? https://github.com/nephio-project/nephio-example-packages

I had planned to move some of the other test pkgs there too. ie. https://github.com/nephio-project/porch/blob/main/test/e2e/e2e_test.go#L90

OK I'll do that

[liamfallon]

This PR is replaced by nephio-project/nephio-example-packages#91