* add `Ping` operation.
* add `Ping` implementation of GA components
* add context to an argument for Ping
* add `Ping` implementation of blobstorage
* fix error string for passing lint
* Update blobstorage.go
Co-authored-by: Artur Souza <artursouza.ms@outlook.com>
* add BulkGet method on state store
* add a bool value in bulk get method to tell dapr if this store supports bulk get or not
* add BulkGetResponse for bulk get; rollback GetResponse to remove new added filed key
* update to use BulkGetResponse for bulk get
* fix lint issues
* fix lint issues
* fix lnit issues