[BUG][Discover] pattern with * as prefix it is not picking hidden index in discover

[abbyhu2000]

Describe the bug

When we create an index pattern with prefix *, it is not picking up hidden index when selecting that index pattern in discover.

For example, when we created the index pattern *index* that can match 4 indices:

• 2 hidden indices sample_index_1_hidden, sample_index_2_hidden
• 2 normal indices sample_index_1_not_hidden, sample_index_2_not_hidden.

When we go to discover, and select *index* in the datasource picker, sample_index_1_hidden, sample_index_2_hidden documents are not be able to show up in discover; only sample_index_1_not_hidden, sample_index_2_not_hidden documents will be shown.

However, if we created the index pattern and name it without using the * as the prefix, for example, sample_index*, then documents from all four indices will be shown.