fix(authority): make searching by all headings handled with separate search field (#790)

fix(authority): make searching by all headings handled with separate search field

Closes: MSEARCH-1020

Author: mukhiddin-yusuf

NEWS.md

@@ -17,6 +17,7 @@
 * Move index recreation before merge range publishing on full reindex ([MSEARCH-1006](https://folio-org.atlassian.net/browse/MSEARCH-1006))
 * Add facet filtering for nested queries ([MSEARCH-1012](https://folio-org.atlassian.net/browse/MSEARCH-1012))
 * NumberFormatException: "1\_000" "20\_000" ([MSEARCH-1016](https://folio-org.atlassian.net/browse/MSEARCH-1016))
+* Authority search: make searching by all heading fields handled with separate/generated search field  ([MSEARCH-1020](https://folio-org.atlassian.net/browse/MSEARCH-1020))
 
 ### Tech Dept
 * Stabilize test execution ([MSEARCH-991](https://folio-org.atlassian.net/browse/MSEARCH-991))