sql: fix CTAS when selecting from some internal virtual tables

This commit fixes an oversight where we forgot to set the SQL stats
provider in some code paths (namely when `NewInternalPlanner` is called,
one example is backfilling query into table that powers CREATE TABLE AS
and CREATE MATERIALIZED VIEW AS features), and this is now fixed.

Release note (bug fix): Previously, CockroachDB would crash when
evaluating CREATE TABLE .. AS or CREATE MATERIALIZED VIEW .. AS
statements when AS clause selected data from
`crdb_internal.cluster_statement_statistics` or
`crdb_internal.cluster_transaction_statistics` virtual tables. The bug
has been present since at least 22.1 and is now fixed.

pkg/sql/logictest/testdata/logic_test/crdb_internal

@@ -1424,3 +1424,10 @@ user root
 
 statement ok
 REVOKE SYSTEM VIEWACTIVITY FROM testuser
+
+# Regression tests for not setting SQL stats provider in the backfill (#76710).
+statement ok
+CREATE TABLE t76710_1 AS SELECT * FROM crdb_internal.statement_statistics;
+
+statement ok
+CREATE MATERIALIZED VIEW t76710_2 AS SELECT fingerprint_id FROM crdb_internal.cluster_statement_statistics;

pkg/sql/planner.go

@@ -502,12 +502,14 @@ func internalExtendedEvalCtx(
 	var sqlStatsController eval.SQLStatsController
 	var schemaTelemetryController eval.SchemaTelemetryController
 	var indexUsageStatsController eval.IndexUsageStatsController
+	var sqlStatsProvider *persistedsqlstats.PersistedSQLStats
 	if ief := execCfg.InternalDB; ief != nil {
 		if ief.server != nil {
 			indexUsageStats = ief.server.indexUsageStats
 			sqlStatsController = ief.server.sqlStatsController
 			schemaTelemetryController = ief.server.schemaTelemetryController
 			indexUsageStatsController = ief.server.indexUsageStatsController
+			sqlStatsProvider = ief.server.sqlStats
 		} else {
 			// If the indexUsageStats is nil from the sql.Server, we create a dummy
 			// index usage stats collector. The sql.Server in the ExecutorConfig
@@ -518,6 +520,7 @@ func internalExtendedEvalCtx(
 			sqlStatsController = &persistedsqlstats.Controller{}
 			schemaTelemetryController = &schematelemetrycontroller.Controller{}
 			indexUsageStatsController = &idxusage.Controller{}
+			sqlStatsProvider = &persistedsqlstats.PersistedSQLStats{}
 		}
 	}
 	ret := extendedEvalContext{
@@ -540,6 +543,7 @@ func internalExtendedEvalCtx(
 		Tracing:         &SessionTracing{},
 		Descs:           tables,
 		indexUsageStats: indexUsageStats,
+		statsProvider:   sqlStatsProvider,
 	}
 	ret.SetDeprecatedContext(ctx)
 	ret.copyFromExecCfg(execCfg)