NGSTACK-843 page indexing implementation from fina + FieldMapper impl… #111

Job	Run time
8.1 unit	32s
8.1 integration legacy	42s
8.1 integration solr 7.7.3 single	2m 12s
8.1 integration solr 7.7.3 dedicated	3m 6s
8.1 integration solr 7.7.3 shared	1m 31s
8.1 integration solr 7.7.3 cloud	3m 20s
8.1 integration solr 7.7.3 regression single	13m 17s
8.1 integration solr 7.7.3 regression dedicated	14m 34s
8.1 integration solr 7.7.3 regression shared	16m 23s
8.1 integration solr 7.7.3 regression cloud	15m 18s
8.1 integration solr 8.11.2 single	1m 48s
8.1 integration solr 8.11.2 dedicated	2m 18s
8.1 integration solr 8.11.2 shared	3m 41s
8.1 integration solr 8.11.2 cloud	1m 54s
8.1 integration solr 8.11.2 regression single	14m 38s
8.1 integration solr 8.11.2 regression dedicated	15m 11s
8.1 integration solr 8.11.2 regression shared	16m 57s
8.1 integration solr 8.11.2 regression cloud	16m 46s
	2h 24m 8s

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