[8.16] Allow for queries on _tier to skip shards during coordinator rewrite (#114990) #115513
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…lastic#114990) The `_tier` metadata field was not used on the coordinator when rewriting queries in order to exclude shards that don't match. This lead to queries in the following form to continue to report failures even though the only unavailable shards were in the tier that was excluded from search (frozen tier in this example): ``` POST testing/_search { "query": { "bool": { "must_not": [ { "term": { "_tier": "data_frozen" } } ] } } } ``` This PR addresses this by having the queries that can execute on `_tier` (term, match, query string, simple query string, prefix, wildcard) execute a coordinator rewrite to exclude the indices that don't match the `_tier` query **before** attempting to reach to the shards (shards, that might not be available and raise errors). Fixes elastic#114910
andreidan
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:Search Foundations/Search
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Backports the following commits to 8.16: