[DOCS][8.19] Promote ESQL search functions to GA in the docs

docs/reference/esql/esql-limitations.asciidoc

@@ -106,8 +106,7 @@ is currently experimental.
 [[esql-limitations-full-text-search]]
 === Full-text search
 
-experimental:[] {esql}'s support for <<esql-search-functions,full-text search>>
-is currently in Technical Preview. One limitation of full-text search is that
+One limitation of <<esql-search-functions,full-text search>> is that
 it is necessary to use the search function, like <<esql-match>>, in a <<esql-where>> command
 directly after the <<esql-from>> source command, or close enough to it.
 Otherwise, the query will fail with a validation error.

docs/reference/esql/functions/operators.asciidoc

@@ -16,7 +16,7 @@ Boolean operators for comparing against one or multiple expressions.
 * <<esql-in-operator>>
 * <<esql-like-operator>>
 * <<esql-rlike-operator>>
-* experimental:[] <<esql-search-operators>>
+* <<esql-search-operators>>
 // end::op_list[]
 
 include::binary.asciidoc[]

docs/reference/esql/functions/search-functions.asciidoc

@@ -16,11 +16,13 @@ See <<esql-limitations-full-text-search,full text search limitations>> for infor
 {esql} supports these full-text search functions:
 
 // tag::search_list[]
-* experimental:[] <<esql-kql>>
-* experimental:[] <<esql-match>>
-* experimental:[] <<esql-qstr>>
+* <<esql-kql>>
+* <<esql-match>>
+* <<esql-match_phrase>>
+*  <<esql-qstr>>
 // end::search_list[]
 
 include::layout/kql.asciidoc[]
 include::layout/match.asciidoc[]
+include::layout/match_phrase.asciidoc[]
 include::layout/qstr.asciidoc[]

docs/reference/esql/functions/search.asciidoc

@@ -4,8 +4,6 @@
 
 The only search operator is match (`:`).
 
-preview::["Do not use on production environments. This functionality is in technical preview and may be changed or removed in a future release. Elastic will work to fix any issues, but features in technical preview are not subject to the support SLA of official GA features."]
-
 The match operator performs a <<query-dsl-match-query,match query>> on the specified field.
 Returns true if the provided query matches the row.
 

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/fulltext/Kql.java

@@ -35,7 +35,6 @@ public class Kql extends FullTextFunction {
 
     @FunctionInfo(
         returnType = "boolean",
-        preview = true,
         description = "Performs a KQL query. Returns true if the provided KQL query string matches the row.",
         examples = { @Example(file = "kql-function", tag = "kql-with-field") }
     )

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/fulltext/Match.java

@@ -133,7 +133,6 @@ public class Match extends FullTextFunction implements OptionalArgument, PostAna
 
     @FunctionInfo(
         returnType = "boolean",
-        preview = true,
         description = """
             Use `MATCH` to perform a <<query-dsl-match-query,match query>> on the specified field.
             Using `MATCH` is equivalent to using the `match` query in the Elasticsearch Query DSL.

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/fulltext/MatchOperator.java

@@ -28,7 +28,6 @@ public class MatchOperator extends Match {
     @FunctionInfo(
         returnType = "boolean",
         operator = ":",
-        preview = true,
         description = """
             Use the match operator (`:`) to perform a <<query-dsl-match-query,match query>> on the specified field.
             Using `:` is equivalent to using the `match` query in the Elasticsearch Query DSL.

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/fulltext/MatchPhrase.java

@@ -90,9 +90,8 @@ public class MatchPhrase extends FullTextFunction implements OptionalArgument, P
 
     @FunctionInfo(
         returnType = "boolean",
-        preview = true,
         description = """
-            Use `MATCH_PHRASE` to perform a [`match_phrase`](/reference/query-languages/query-dsl/query-dsl-match-query-phrase.md) on the
+            Use `MATCH_PHRASE` to perform a <<query-dsl-match-query-phrase,`match_phrase` query>> on the
             specified field.
             Using `MATCH_PHRASE` is equivalent to using the `match_phrase` query in the Elasticsearch Query DSL.
 
@@ -101,7 +100,7 @@ public class MatchPhrase extends FullTextFunction implements OptionalArgument, P
 
             MatchPhrase can use <<esql-function-named-params,function named parameters>> to specify additional options for the
             match_phrase query.
-            All [`match_phrase`](/reference/query-languages/query-dsl/query-dsl-match-query-phrase.md) query parameters are supported.
+            All <<query-dsl-match-query-phrase,`match_phrase` query>> query parameters are supported.
 
             `MATCH_PHRASE` returns true if the provided query matches the row.""",
         examples = { @Example(file = "match-phrase-function", tag = "match-phrase-with-field") }

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/fulltext/QueryString.java

@@ -108,7 +108,6 @@ public class QueryString extends FullTextFunction implements OptionalArgument {
 
     @FunctionInfo(
         returnType = "boolean",
-        preview = true,
         description = "Performs a <<query-dsl-query-string-query,query string query>>. "
             + "Returns true if the provided query string matches the row.",
         examples = {