minor: doc: use the same style of version_added across repo (#703)

minor(doc): use the same style of version_added across repo

SUMMARY
Currently is no single style of version_added, in some places it's unquoted, somewhere single quote is used, in another places it's double quoted. Moreover, some file had different styles in one single file.
The aim of this PR is to update whole repo to single style for version_added
ISSUE TYPE

Docs Pull Request

COMPONENT NAME
kustomize
helm
helm_info
helm_plugin
helm_plugin_info
helm_pull
helm_repository
helm_template
k8s_cluster_info
k8s_cp
k8s_drain
k8s_exec
k8s_log
k8s_rollback
k8s_taint
ADDITIONAL INFORMATION
The same style is proposed as used in amazon.aws collections

Reviewed-by: Kelv Gooding
Reviewed-by: Alina Buzachis
Reviewed-by: Mike Graves <mgraves@redhat.com>

plugins/modules/helm_plugin.py

@@ -12,7 +12,7 @@ DOCUMENTATION = r"""
 ---
 module: helm_plugin
 short_description: Manage Helm plugins
-version_added: "1.0.0"
+version_added: 1.0.0
 author:
   - Abhijeet Kasurde (@Akasurde)
 requirements:
@@ -47,7 +47,7 @@ options:
       - Ignored when C(state=absent) or C(state=latest).
     required: false
     type: str
-    version_added: "2.3.0"
+    version_added: 2.3.0
 extends_documentation_fragment:
   - kubernetes.core.helm_common_options
 """