release-24.2: schemachanger: add PartitionName to IndexZoneConfig attr

This patch adds a `PartitionName` attribute to the `IndexZoneConfig`
element to uniquely identify partitions from one another. Prior to this,
performing a DROP on a TODO

Epic: none
Fixes: #131862

Release note (bug fix): TODO

pkg/ccl/logictestccl/testdata/logic_test/multi_region_zone_configs

@@ -1864,3 +1864,27 @@ SELECT crdb_internal.reset_multi_region_zone_configs_for_table($tbl11_id)
 
 query error user testuser must be owner of test or have CREATE privilege on database test
 SELECT crdb_internal.validate_multi_region_zone_configs()
+
+subtest drop_all_backrefs
+
+user root
+
+statement ok
+CREATE DATABASE db1 PRIMARY REGION "ca-central-1" REGIONS "ap-southeast-2", "us-east-1" SURVIVE REGION FAILURE
+
+statement ok
+CREATE TABLE db1.t1_with_index_zone(x INT, j INT REFERENCES db1.t1_with_index_zone(x), PRIMARY KEY(x)) LOCALITY REGIONAL BY ROW
+
+statement ok
+ALTER PARTITION "ap-southeast-2" OF INDEX db1.t1_with_index_zone@t1_with_index_zone_pkey CONFIGURE ZONE USING gc.ttlseconds = 32000;
+
+statement ok
+ALTER PARTITION "ca-central-1" OF INDEX db1.t1_with_index_zone@t1_with_index_zone_pkey CONFIGURE ZONE USING gc.ttlseconds = 34000;
+
+statement ok
+ALTER PARTITION "us-east-1" OF INDEX db1.t1_with_index_zone@t1_with_index_zone_pkey CONFIGURE ZONE USING gc.ttlseconds = 38000;
+
+statement ok
+DROP TABLE db1.t1_with_index_zone CASCADE;
+
+subtest end

pkg/sql/schemachanger/screl/attr.go

@@ -100,6 +100,9 @@ const (
 	// Expr corresponds to the string representation of a SQL expression for an element.
 	Expr
 
+	// PartitionName corresponds to the name of a partition.
+	PartitionName
+
 	// AttrMax is the largest possible Attr value.
 	// Note: add any new enum values before TargetStatus, leave these at the end.
 	AttrMax = iota - 1
@@ -385,6 +388,7 @@ var elementSchemaOptions = []rel.SchemaOption{
 	rel.EntityMapping(t((*scpb.IndexZoneConfig)(nil)),
 		rel.EntityAttr(DescID, "TableID"),
 		rel.EntityAttr(IndexID, "IndexID"),
+		rel.EntityAttr(PartitionName, "PartitionName"),
 	),
 	rel.EntityMapping(t((*scpb.DatabaseData)(nil)),
 		rel.EntityAttr(DescID, "DatabaseID"),