Fixed bug when using multi percolate api with routing #9161
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Fixes a bug that was caused by specifying routing on a multi percolate request causing an ArrayIndexOutOfBoundsException.
The multi percolate shard responses are collected in an atomic array which uses the shard id is used as index, but the number of shards the multi percolate request was meant to go to was used as size of this array instead the total number of shards an index has and this caused the exception when routing was used.
PR for #6214