feat: Add cloud provider info to the gateways

[hisarbalik]

Description

Changes proposed in this pull request (what was done and why):

• Add configuration to the k8sattribute processor of gateways (metric, trace, and log) to enrich telemetry data with cloud.availability_zone, cloud.region, host.arch, and host.type from well-known kubernetes labels of nodes
• Add configuration to the resource processor insert-cluster-attributes of gateways (metric, trace, and log) to enrich telemetry data with k8s.cluster.name and cloud.provider. The data of both were retrieved from custom ConfigMap shoot-info of gardener clusters, for other runtimes, the attribute cloud.provider ignored, and the value of attribute k8s.cluster.name fall-back to the API-Server URL

Changes refer to particular issues, PRs or documents:

• Enrich cloud-provider to all data passing a gateway #1685

Traceability

• The PR is linked to a GitHub issue.
• The follow-up issues (if any) are linked in the Related Issues section.
• If the change is user-facing, the documentation has been adjusted.
• If a CRD is changed, the corresponding Busola ConfigMap has been adjusted.
• The feature is unit-tested.
• The feature is e2e-tested.

[rakesh-garimella]

do we know in case of k3d how this works ? will it be left empty ?

[hisarbalik]

for k3d and any cluster that doesn't use the labels on nodes, the attributes will not be present on the telemetry data being processed