Search: Downgrade Bluge, refactor code (#51560)

Co-authored-by: Ryan McKinley <ryantxu@gmail.com>

go.mod

@@ -240,8 +240,7 @@ require (
 	github.com/Azure/azure-sdk-for-go/sdk/keyvault/azkeys v0.4.0
 	github.com/Azure/go-autorest/autorest/adal v0.9.17
 	github.com/armon/go-radix v1.0.0
-	github.com/blugelabs/bluge v0.2.1
-	github.com/blugelabs/bluge_segment_api v0.2.0
+	github.com/blugelabs/bluge v0.1.9
 	github.com/getkin/kin-openapi v0.94.0
 	github.com/golang-migrate/migrate/v4 v4.7.0
 	github.com/grafana/dskit v0.0.0-20211011144203-3a88ec0b675f
@@ -256,6 +255,7 @@ require (
 require (
 	cloud.google.com/go v0.100.2 // indirect
 	github.com/armon/go-metrics v0.3.10 // indirect
+	github.com/blugelabs/bluge_segment_api v0.2.0 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
 	github.com/google/gofuzz v1.2.0 // indirect
 	github.com/gosimple/unidecode v1.0.1 // indirect
@@ -282,7 +282,6 @@ require (
 	github.com/blevesearch/snowballstem v0.9.0 // indirect
 	github.com/blevesearch/vellum v1.0.7 // indirect
 	github.com/blugelabs/ice v1.0.0 // indirect
-	github.com/blugelabs/ice/v2 v2.0.1 // indirect
 	github.com/caio/go-tdigest v3.1.0+incompatible // indirect
 	github.com/chromedp/cdproto v0.0.0-20220208224320-6efb837e6bc2 // indirect
 	github.com/containerd/containerd v1.6.6 // indirect