Render status cleanup through "PorchFile" implementation

[Catalin-Stratulat-Ericsson]

This PR is an amalgamation of 3 separate issues, these being
nephio-project/nephio#699,
nephio-project/nephio#603,
nephio-project/nephio#783
The first 2 mainly address the render status of a porch package, at the moment the render status is not propagating down to the PackageRevisionResources and always returns an exit code 0 status even when a rendering issue was encountered (#603).
An Improvement in the returned render status data as per (#603 & #699). It achieves this propagating metadata such as the latest render status to a "PorchFile" suggested by @kispaljr in (#783).
This solution does "work" in the sense that it is able to accomplish what I've mentioned above however there are 2 main problems and as the discussion in (#783) is still ongoing i wish to open this up to suggestions/opinions.

[nephio-prow]

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[Catalin-Stratulat-Ericsson]

1st Problem (Not Efficient):
The current implementation requires a second patch after the render to inject the porch file(containing said render status). this is obviously highly inefficient as every single package would now need to on update run a patch, render, and now another patch(containing the porch file). Any suggestion on how to improve this would be greatly welcomed.

[Catalin-Stratulat-Ericsson]

2nd Problem (Failing Tests):
The second issue relates to the first in a way and it relates to the tests. the TestUpdateResources & TestUpdateResourcesEmptyPatch in particular, ive gone through these tests and the second call of the patch seems to cause conflicts on this line https://github.com/Nordix/porch/blob/330b9d3ce0b5a7fa84e26b64a0c17fa764a37848/pkg/engine/engine.go#L1082.