Use kubeconfig if either context or kubeconfig is set (#47373) (#47496)

* Use kubeconfig if either context or kubeconfig is set (#47373)

kubeconfig should be loaded if *either* or both of context
or kubeconfig is set (this allows picking a context and default
kubeconfig or picking a kubeconfig with default context)

Fixes #47149

(cherry picked from commit 00ccad9764)

* Add changelog for k8s auth config fix

changelogs/fragments/k8s_auth_kubeconfig.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - k8s - allow kubeconfig or context to be set without the other

lib/ansible/module_utils/k8s/common.py

@@ -152,7 +152,7 @@ class K8sAnsibleMixin(object):
         if auth_set('username', 'password', 'host') or auth_set('api_key', 'host'):
             # We have enough in the parameters to authenticate, no need to load incluster or kubeconfig
             pass
-        elif auth_set('kubeconfig', 'context'):
+        elif auth_set('kubeconfig') or auth_set('context'):
             kubernetes.config.load_kube_config(auth.get('kubeconfig'), auth.get('context'))
         else:
             # First try to do incluster config, then kubeconfig