Add K8S_CONTEXT label documentation

[dkosteck]

This is contingent on, and related to nephio-project/test-infra#269 so will be submitted as a draft for the time being. Documenting the additional variable of K8S_CONTEXT introduced in the linked PR for deploying Nephio components on non-kind clusters.

Note also that in the "Real K8s Cluster" installation instructions the branch should be updated once nephio-project/test-infra#269 is merged and a new tag is available.

Closes nephio-project/nephio#577

[nephio-prow]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

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[CsatariGergely]

Is this always a VM and do we always need to log in?

[dkosteck]

This is the wording that was already present in the doc, and given that the heading of this section is "Kick Off an Installation on VM" I personally would leave the text as is

[arora-sagar]

@dkosteck I am rearranging the documents and I believe adding this text in https://github.com/nephio-project/docs/blob/main/content/en/docs/guides/install-guides/install-on-single-vm.md guide rather than in the index is better.

I am thinking of removing the text from the index as it is repetitive.

[dkosteck]

@dkosteck I am rearranging the documents and I believe adding this text in https://github.com/nephio-project/docs/blob/main/content/en/docs/guides/install-guides/install-on-single-vm.md guide rather than in the index is better.

I am thinking of removing the text from the index as it is repetitive.

@arora-sagar That's fine, but in the interim I would say that the new variable and usage should still be documented here, and if it gets reshuffled by your PR then that's fine. Since nephio-project/test-infra#269 was merged though it seems this should be present in the current table and location, at least for the time being

[arora-sagar]

@dkosteck I am rearranging the documents and I believe adding this text in https://github.com/nephio-project/docs/blob/main/content/en/docs/guides/install-guides/install-on-single-vm.md guide rather than in the index is better.
I am thinking of removing the text from the index as it is repetitive.

@arora-sagar That's fine, but in the interim I would say that the new variable and usage should still be documented here, and if it gets reshuffled by your PR then that's fine. Since nephio-project/test-infra#269 was merged though it seems this should be present in the current table and location, at least for the time being

Okay then lets merge this and then I will add a PR on the top.

[CsatariGergely]

/approve

[liamfallon]

/approve
/lgtm

[nephio-prow]

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