logic test: deflake distsql_stats

A recent change introduced by #150238 caused this test to sometimes
choose a local plan distribution when using the 5node logic test
configuration. This test is really more about the estimated row counts,
so constrain the the EXPLAIN statements to just look at row count
estimates instead of the entire plan.

Fixes: #151839
Release note: None

Author: mw5h

pkg/sql/logictest/testdata/logic_test/distsql_stats

@@ -3411,76 +3411,36 @@ NULL  {m}  1000  1000  true
 NULL  {n}  1000  50    true
 NULL  {o}  1000  33    true
 
+# All we care about is the row counts, so don't error if other parts of the explain output change
 query T retry
-EXPLAIN SELECT * FROM mno WHERE n = 1 AND o = 9
+SELECT info FROM [EXPLAIN SELECT * FROM mno WHERE n = 1 AND o = 9] WHERE info LIKE '%estimated row count:%'
 ----
-distribution: full
-vectorized: true
-·
-• render
-│
-└── • filter
     │ estimated row count: 1
-    │ filter: n = 1
-    │
-    └── • scan
           estimated row count: 18 (1.8% of the table; stats collected <hidden> ago)
-          table: mno@mno_o_idx
-          spans: [/9 - /9]
 
+# All we care about is the row counts, so don't error if other parts of the explain output change
 query T
-EXPLAIN SELECT * FROM mno WHERE n = 1 AND o = 11
+SELECT info FROM [EXPLAIN SELECT * FROM mno WHERE n = 1 AND o = 11] WHERE info LIKE '%estimated row count:%'
 ----
-distribution: full
-vectorized: true
-·
-• render
-│
-└── • filter
     │ estimated row count: 1
-    │ filter: sqrt(m::FLOAT8)::INT8 = 11
-    │
-    └── • scan
           estimated row count: 20 (2.0% of the table; stats collected <hidden> ago)
-          table: mno@mno_n_idx
-          spans: [/1 - /1]
 
 statement ok
 SET optimizer_use_virtual_computed_column_stats = false
 
+# All we care about is the row counts, so don't error if other parts of the explain output change
 query T
-EXPLAIN SELECT * FROM mno WHERE n = 1 AND o = 9
+SELECT info FROM [EXPLAIN SELECT * FROM mno WHERE n = 1 AND o = 9] WHERE info LIKE '%estimated row count:%'
 ----
-distribution: full
-vectorized: true
-·
-• render
-│
-└── • filter
     │ estimated row count: 7
-    │ filter: n = 1
-    │
-    └── • scan
           estimated row count: 10 (1.0% of the table; stats collected <hidden> ago)
-          table: mno@mno_o_idx
-          spans: [/9 - /9]
 
+# All we care about is the row counts, so don't error if other parts of the explain output change
 query T
-EXPLAIN SELECT * FROM mno WHERE n = 1 AND o = 11
+SELECT info FROM [EXPLAIN SELECT * FROM mno WHERE n = 1 AND o = 11] WHERE info LIKE '%estimated row count:%'
 ----
-distribution: full
-vectorized: true
-·
-• render
-│
-└── • filter
     │ estimated row count: 7
-    │ filter: n = 1
-    │
-    └── • scan
           estimated row count: 10 (1.0% of the table; stats collected <hidden> ago)
-          table: mno@mno_o_idx
-          spans: [/11 - /11]
 
 # Regression for not setting the TypeResolver on the SemaContext when dealing
 # with stats on virtual computed columns (#122312).
@@ -3577,39 +3537,25 @@ column_names  row_count  null_count  distinct_count  avg_size  has_histogram
 {b}           2          0           2               8         true
 {c}           2          0           2               8         true
 
+# All we care about is the row counts, so don't error if other parts of the explain output change
 query T retry
-EXPLAIN SELECT count(*) FROM t138809 WHERE b > 1
+SELECT info FROM [EXPLAIN SELECT count(*) FROM t138809 WHERE b > 1] WHERE info LIKE '%estimated row count:%'
 ----
-distribution: full
-vectorized: true
-·
-• group (scalar)
 │ estimated row count: 1
-│
-└── • scan
       estimated row count: 2 (100% of the table; stats collected <hidden> ago)
-      table: t138809@t138809_pkey
-      spans: [/1 - ]
 
 statement ok
 SET CLUSTER SETTING jobs.debug.pausepoints = 'schemachanger.root..1'
 
 statement error job \d+ was paused before it completed with reason: pause point "schemachanger\.root\.\.1" hit
 ALTER TABLE t138809 DROP COLUMN c
 
+# All we care about is the row counts, so don't error if other parts of the explain output change
 query T
-EXPLAIN SELECT count(*) FROM t138809 WHERE b > 1
+SELECT info FROM [EXPLAIN SELECT count(*) FROM t138809 WHERE b > 1] WHERE info LIKE '%estimated row count:%'
 ----
-distribution: full
-vectorized: true
-·
-• group (scalar)
 │ estimated row count: 1
-│
-└── • scan
       estimated row count: 2 (100% of the table; stats collected <hidden> ago)
-      table: t138809@t138809_pkey
-      spans: [/1 - ]
 
 statement ok
 SET CLUSTER SETTING jobs.debug.pausepoints = DEFAULT