Support backup/restore for vector index

[pixcc]

ydb/ydb/services/ydb/backup_ut/ydb_backup_ut.cpp

Line 696 in 0d933fd

break; // https://github.com/ydb-platform/ydb/issues/10469

ydb/ydb/services/ydb/backup_ut/ydb_backup_ut.cpp

Line 1076 in 0d933fd

break; // https://github.com/ydb-platform/ydb/issues/10469

ydb/ydb/core/tx/schemeshard/ut_restore/ut_restore.cpp

Line 2693 in 0d933fd

void ShouldSucceedOnIndexedTable(ui32 indexes, const TString& indexType = "global_index {}") {

ydb/ydb/core/tx/schemeshard/ut_restore/ut_restore.cpp

Line 4696 in 0d933fd

Y_UNIT_TEST(ShouldSucceedOnIndexedTable) {

[MBkkt]

1. and 2. -- Add tests for vector index backup #14096