Update porch dependencies to nephio porch modules

[efiacor]

#779

Main change here was to remove the use of the replace directive for porch in the go.mod files.
Update the import paths.
Minor code updates.
Update the other dependencies to satisfy the existing codebase.

[efiacor]

/retest

[radoslawc]

/override presubmit-nephio-lichen
this is false positive and needs further investigation

[nephio-prow]

@radoslawc: Overrode contexts on behalf of radoslawc: presubmit-nephio-lichen

In response to this:

/override presubmit-nephio-lichen
this is false positive and needs further investigation

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[kispaljr]

changes look good and unit tests are all green on my machine

/lgtm

[liamfallon]

/approve
/lgtm

[nephio-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: liamfallon

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[liamfallon]

/test presubmit-nephio-golangci-lint

[radoslawc]

/test presubmit-nephio-lichen

[henderiw]

I could not test but overall
/lgtm