Remove abbreviation of kubernetes in resource semantic conventions

[mlunadia]

The current specification for kubernetes resources is k8s.*

While k8s is a popular abbreviation within the Kubernetes community, using the full name kubernetes is preferable in most situations to ensure clear communication and alignment with standard practices.

There is a lot of scope to expand into further fields for semantic conventions for kubernetes and whilst there are a few fields it may be practical to consider removing the abbreviation given the below reasons:

1. Clarity: Using "Kubernetes" ensures clarity and avoids confusion compared to the abbreviation "k8s" which not everybody might be familiar with.
2. Standard Terminology: "Kubernetes" is the recognized and widely used name for the platform.
3. Consistency: Using "Kubernetes" maintains consistency in discussions and documentation.
4. Searchability: "Kubernetes" yields more accurate search results when seeking information.
5. Professionalism: Using the full name demonstrates professionalism and adherence to standards.

[ChrsMark]

FYI, if we decide to replace k8s with kubernetes it would need a transition plan on the collector's side as well: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/receiver/kubeletstatsreceiver/documentation.md

[TylerHelmuth]

This would be an incredibly impactful change. If we were to move forward with something like this we will need a plan as robust as the ECS http change.

I do also want to callout that this is not the naming standard in use by KubeStateMetrics, which uses kube: https://github.com/kubernetes/kube-state-metrics/blob/main/docs/pod-metrics.md.

[austinlparker]

k8s is an accepted abbreviation of kubernetes, with wide usage inside the community (for example, the Kubernetes package registry is registry.k8s.io, among other examples). I do not see value in pursuing a massively breaking change throughout semantic conventions when the likelihood of k8s ever causing a collision with another convention is extremely low.

[mlunadia]

Thank you all for the input, and fair comments. Agree that either is acceptable.
Closing this issue to convey agreement on k8s