Fix VACUUM flakiness in multi_utilities (#7334)

When I run this test in my local, the size of the table after the DELETE
command is around 58785792. Hence, I assume that the diffs suggest that
the Vacuum had no effect. The current solution is to run the VACUUM
command three times instead of once.

Example diff:
https://github.com/citusdata/citus/actions/runs/6722231142/attempts/1#summary-18269870674
```diff
insert into local_vacuum_table select i from generate_series(1,1000000) i;
 delete from local_vacuum_table;
 VACUUM local_vacuum_table;
 SELECT CASE WHEN s BETWEEN 20000000 AND 25000000 THEN 22500000 ELSE s END
 FROM pg_total_relation_size('local_vacuum_table') s ;
     s     
 ----------
- 22500000
+ 58785792
 (1 row)
```
See more diff examples in the PR description
#7334

src/test/regress/citus_tests/run_test.py

@@ -207,6 +207,10 @@ def extra_tests(self):
             "multi_cluster_management",
         ],
     ),
+    "multi_utilities": TestDeps(
+        "minimal_schedule",
+        ["multi_data_types"],
+    ),
 }
 
 

src/test/regress/expected/multi_utilities.out

@@ -348,6 +348,8 @@ DETAIL:  on server postgres@localhost:xxxxx connectionId: xxxxxxx
 insert into local_vacuum_table select i from generate_series(1,1000000) i;
 delete from local_vacuum_table;
 VACUUM local_vacuum_table;
+VACUUM local_vacuum_table;
+VACUUM local_vacuum_table;
 SELECT CASE WHEN s BETWEEN 20000000 AND 25000000 THEN 22500000 ELSE s END
 FROM pg_total_relation_size('local_vacuum_table') s ;
     s
@@ -401,6 +403,8 @@ VACUUM (DISABLE_PAGE_SKIPPING false) local_vacuum_table;
 insert into local_vacuum_table select i from generate_series(1,1000000) i;
 delete from local_vacuum_table;
 VACUUM (INDEX_CLEANUP OFF, PARALLEL 1) local_vacuum_table;
+VACUUM (INDEX_CLEANUP OFF, PARALLEL 1) local_vacuum_table;
+VACUUM (INDEX_CLEANUP OFF, PARALLEL 1) local_vacuum_table;
 SELECT CASE WHEN s BETWEEN 50000000 AND 70000000 THEN 60000000 ELSE s END size
 FROM pg_total_relation_size('local_vacuum_table') s ;
    size
@@ -411,6 +415,8 @@ FROM pg_total_relation_size('local_vacuum_table') s ;
 insert into local_vacuum_table select i from generate_series(1,1000000) i;
 delete from local_vacuum_table;
 VACUUM (INDEX_CLEANUP ON, PARALLEL 1) local_vacuum_table;
+VACUUM (INDEX_CLEANUP ON, PARALLEL 1) local_vacuum_table;
+VACUUM (INDEX_CLEANUP ON, PARALLEL 1) local_vacuum_table;
 SELECT CASE WHEN s BETWEEN 20000000 AND 49999999 THEN 35000000 ELSE s END size
 FROM pg_total_relation_size('local_vacuum_table') s ;
    size
@@ -422,10 +428,14 @@ FROM pg_total_relation_size('local_vacuum_table') s ;
 insert into local_vacuum_table select i from generate_series(1,1000000) i;
 delete from local_vacuum_table;
 vacuum (TRUNCATE false) local_vacuum_table;
+vacuum (TRUNCATE false) local_vacuum_table;
+vacuum (TRUNCATE false) local_vacuum_table;
 SELECT pg_total_relation_size('local_vacuum_table') as size1 \gset
 insert into local_vacuum_table select i from generate_series(1,1000000) i;
 delete from local_vacuum_table;
 vacuum (TRUNCATE true) local_vacuum_table;
+vacuum (TRUNCATE true) local_vacuum_table;
+vacuum (TRUNCATE true) local_vacuum_table;
 SELECT pg_total_relation_size('local_vacuum_table') as size2 \gset
 SELECT :size1 > :size2 as truncate_less_size;
  truncate_less_size

src/test/regress/sql/multi_utilities.sql

@@ -229,6 +229,8 @@ VACUUM;
 insert into local_vacuum_table select i from generate_series(1,1000000) i;
 delete from local_vacuum_table;
 VACUUM local_vacuum_table;
+VACUUM local_vacuum_table;
+VACUUM local_vacuum_table;
 SELECT CASE WHEN s BETWEEN 20000000 AND 25000000 THEN 22500000 ELSE s END
 FROM pg_total_relation_size('local_vacuum_table') s ;
 
@@ -257,24 +259,32 @@ VACUUM (DISABLE_PAGE_SKIPPING false) local_vacuum_table;
 insert into local_vacuum_table select i from generate_series(1,1000000) i;
 delete from local_vacuum_table;
 VACUUM (INDEX_CLEANUP OFF, PARALLEL 1) local_vacuum_table;
+VACUUM (INDEX_CLEANUP OFF, PARALLEL 1) local_vacuum_table;
+VACUUM (INDEX_CLEANUP OFF, PARALLEL 1) local_vacuum_table;
 SELECT CASE WHEN s BETWEEN 50000000 AND 70000000 THEN 60000000 ELSE s END size
 FROM pg_total_relation_size('local_vacuum_table') s ;
 
 insert into local_vacuum_table select i from generate_series(1,1000000) i;
 delete from local_vacuum_table;
 VACUUM (INDEX_CLEANUP ON, PARALLEL 1) local_vacuum_table;
+VACUUM (INDEX_CLEANUP ON, PARALLEL 1) local_vacuum_table;
+VACUUM (INDEX_CLEANUP ON, PARALLEL 1) local_vacuum_table;
 SELECT CASE WHEN s BETWEEN 20000000 AND 49999999 THEN 35000000 ELSE s END size
 FROM pg_total_relation_size('local_vacuum_table') s ;
 
 -- vacuum (truncate false) should not attempt to truncate off any empty pages at the end of the table (default is true)
 insert into local_vacuum_table select i from generate_series(1,1000000) i;
 delete from local_vacuum_table;
 vacuum (TRUNCATE false) local_vacuum_table;
+vacuum (TRUNCATE false) local_vacuum_table;
+vacuum (TRUNCATE false) local_vacuum_table;
 SELECT pg_total_relation_size('local_vacuum_table') as size1 \gset
 
 insert into local_vacuum_table select i from generate_series(1,1000000) i;
 delete from local_vacuum_table;
 vacuum (TRUNCATE true) local_vacuum_table;
+vacuum (TRUNCATE true) local_vacuum_table;
+vacuum (TRUNCATE true) local_vacuum_table;
 SELECT pg_total_relation_size('local_vacuum_table') as size2 \gset
 
 SELECT :size1 > :size2 as truncate_less_size;