Alternate shard id not created for indexes created post upgrade(offline) to 7.6.0

Upgrade from 7.2.1-5928 to 7.6.0-1878

Steps to repro 

1. Create cluster with the following cluster: n1ql-index-n1ql-index-kv-kv
2. Create a bucket and different types of indexes
3. Do a offline upgrade of the nodes in the order of kv-kv-index-n1ql-index-n1ql. Offline upgrade as in stop couchbase server on the node, upgrade the node and start couchbase server on the upgraded node
4. Once all the nodes are upgraded create another set of different indexes, ideally indexes created in a fully upgraded cluster should have alternate shard id's

Index for which alternate shard id not present -hotel048dfa35b9094be4a942a8341a84b407array_index_overall

Index definition -> 

CREATE INDEX `hotel048dfa35b9094be4a942a8341a84b407array_index_overall` ON `test_bucket`(`price`,(all (array ((`v`.`ratings`).`Overall`) for `v` in `reviews` end))) WITH { "nodes":[ "172.23.122.220:8091","172.23.122.79:8091" ], "num_replica":1 }

Logs ->
test_6 (2).zip