Check possibility to remove redundant inventory-storage GIN and full-text indexes

Purpose/Overview:

The migration process (updating all records in instances table) takes 8+ hours. Without indexes and triggers it takes ~ 30 mins.

Requirements/Scope:

1. Investigation should be done in order to find out what modules uses this indexes.
2. The redundant indexes should be removed from redundant schema json.

The following indexes are supposed to be removed:

For Instance:

• title
• indexTitle
• contributors
• subjects
• classifications
• keyword
• allTitles
• contributorsNames
• languages
• dateOfPublication
  NB: The identifiers full-text index is retained. It means that ISBN and normalized ISBN search in inventory will work.

For holdings:

• electronicAccess
• callNumberAndSuffixNormalized
• fullCallNumberNormalized

For item:

• status.name
• callNumberAndSuffixNormalized
• fullCallNumberNormalized