[maps] vector tile layer does not display request warnings

[nreese]

Steps to view problem

1. In console, run:

   PUT geo1
   {}
   
   PUT geo1/_mapping
   {
     "properties": {
       "location": {
         "type": "geo_point"
       }
     }
   }
   
   PUT geo1/_doc/1
   {
     "location": "25,25"
   }
   
   PUT geo2
   {}
   
   PUT geo2/_mapping
   {
     "properties": {
       "location": {
         "type": "geo_point"
       }
     }
   }
   
   PUT geo2/_doc/1
   {
     "location": "35,35"
   }
   

2. Create geo* data view
3. create new map, add documents layer from geo* data view.
4. add filter

   {
     "error_query": {
       "indices": [
         {
           "error_type": "exception",
           "message": "local shard failure message 123",
           "name": "geo2"
         }
       ]
     }
   }
   

5. Notice how no warnings are displayed to user, yet there is a shard failure and partial results are displayed. This may causes users to make incorrect inferences from map.
6. You can view the shard failure by running the vector request in console

   POST /geo*/_mvt/location/1/1/0
   {
     "buffer": 0,
     "grid_precision": 0,
     "exact_bounds": true,
     "extent": 4096,
     "query": {
       "bool": {
         "filter": [
           {
             "error_query": {
               "indices": [
                 {
                   "error_type": "exception",
                   "message": "local shard failure message 123",
                   "name": "geo2"
                 }
               ]
             }
           }
         ],
         "must": [],
         "must_not": [],
         "should": []
       }
     },
     "runtime_mappings": {},
     "track_total_hits": 10001,
     "with_labels": false,
     "fields": []
   }
   

   Notice how the response meta contains the shard failures that need to be surfaced in the UI

   {
     "meta": [
       {
         "geometry": {
           "type": "Point",
           "coordinates": [
             569,
             3508
           ]
         },
         "properties": {
           "_shards.failed": 1,
           "_shards.failures.0.index": "geo2",
           "_shards.failures.0.node": "NvVWLT9BQXCC9M-4L_oo2Q",
           "_shards.failures.0.reason.caused_by.reason": "[geo2][0] local shard failure message 123",
           "_shards.failures.0.reason.caused_by.type": "runtime_exception",
           "_shards.failures.0.reason.index": "geo2",
           "_shards.failures.0.reason.index_uuid": "_oFDcbPoRVaU-sdUf5yeiQ",
           "_shards.failures.0.reason.reason": "failed to create query: [geo2][0] local shard failure message 123",
           "_shards.failures.0.reason.type": "query_shard_exception",
           "_shards.failures.0.shard": 0,
           "_shards.skipped": 0,
           "_shards.successful": 1,
           "_shards.total": 2,
           "hits.total.relation": "eq",
           "hits.total.value": 1,
           "timed_out": false,
           "took": 1
         }
       }
     ],
     "hits": []
   }
   

Instead, layer legend should indicate warning. Legend should display warning icon and legend details should display warning callout.

[elasticmachine]

Pinging @elastic/kibana-presentation (Team:Presentation)