test: reset enable_compute_peek_row_iteration_limit after use

persist-fast-path.slt and max_result_size.slt reset
compute_peek_row_iteration_limit at the end but leave the feature
flag itself enabled. That is harmless under bin/sqllogictest, whose
suite default for the limit is very high, but wrong against a plain
environmentd where the code default is 1000.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: antiguru

test/sqllogictest/max_result_size.slt

@@ -86,6 +86,11 @@ ALTER SYSTEM RESET compute_peek_row_iteration_limit;
 ----
 COMPLETE 0
 
+simple conn=mz_system,user=mz_system
+ALTER SYSTEM RESET enable_compute_peek_row_iteration_limit;
+----
+COMPLETE 0
+
 statement ok
 SET cluster TO 'quickstart';
 

test/sqllogictest/persist-fast-path.slt

@@ -275,6 +275,11 @@ ALTER SYSTEM RESET compute_peek_row_iteration_limit;
 ----
 COMPLETE 0
 
+simple conn=mz_system,user=mz_system
+ALTER SYSTEM RESET enable_compute_peek_row_iteration_limit;
+----
+COMPLETE 0
+
 # The Persist fast path does not apply when an index exists.
 
 statement ok