Slack vitess 2020.01.11.rc0

[ajm188]

For vtctld, just to get the diff reviewed and approved. We shouldn't merge this to tinyspeck/master.

Contains the following PRs:

• Initial implementation of vtctld service vitessio/vitess#7128
• Add FindAllShardsInKeyspace to vtctldserver vitessio/vitess#7201
• [vtctldclient] vtctldclient generator vitessio/vitess#7238

I ran make build at each cherry-pick; the code is buildable and I can run the local example at hit a grpc endpoint:

❯ vtctldclient --server "localhost:15999" FindAllShardsInKeyspace commerce | jq '.'
{
  "shards": {
    "0": {
      "keyspace": "commerce",
      "name": "0",
      "shard": {
        "master_alias": {
          "cell": "zone1",
          "uid": 100
        },
        "master_term_start_time": {
          "seconds": 1610323010,
          "nanoseconds": 829901000
        },
        "is_master_serving": true
      }
    }
  }
}

[ajm188]

Closing and re-opening this because I have managed to once again use 2020 as the year when I meant 2021.