Alerting: Set folder permissions to "view" for nested folder selectors (#105258)

set folder permissions to "view"

alerts are allowed to be created in folders where the user only has the
"read" permission, "write" permissions is not required and is only used
to allow creating new folders.

public/app/features/alerting/unified/components/import-to-gma/ImportFromDSRules.tsx

@@ -151,6 +151,7 @@ const ImportFromDSRules = () => {
                         render={({ field: { onChange, ref, ...field } }) => (
                           <Stack width={42}>
                             <NestedFolderPicker
+                              permission="view"
                               showRootFolder={false}
                               invalid={!!errors.targetFolder?.message}
                               {...field}

public/app/features/alerting/unified/components/rule-editor/FolderSelector.tsx

@@ -50,6 +50,7 @@ export function FolderSelector() {
               render={({ field: { ref, ...field } }) => (
                 <div style={{ width: 420 }}>
                   <NestedFolderPicker
+                    permission="view"
                     showRootFolder={false}
                     invalid={!!errors.folder?.message}
                     {...field}