Remove "material specified" from electronic access searchable properties

Purpose/Overview:

The current implementation includes electronicAccess[].materialSpecified as a searchable element.  It has been determined by SMEs that this is data that is very unlikely to be used in searches.

Requirements/Scope:

1. Remove the data related to electronicAceess[].materialSpecified from index
2. Remove materialSpecification from the list of supported query parameters
3. The change occurs on instance, holdings and item level

Approach:

Acceptance criteria:

• Search by electronicAccess[].uri, electronicAccess[].linkText and electronicAccess[]publicNote is not affected and current behavior does not change.
• materialSpecification query parameter is removed from all record levels
• Existing documentation is updated

Additional information:

Inventory Search Use Cases: https://wiki.folio.org/display/MM/Inventory+Search+Use+Cases