Fix a memory leak in reconciliation after aborted eviction

==6758==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 9374 byte(s) in 7 object(s) allocated from:

#0 0x4984bd in malloc

#1 0x7ff1c5ae53e2 in __wt_malloc rc/os_common/os_alloc.c:91:14

#2 0x7ff1c5ae5f51 in __wt_memdup src/os_common/os_alloc.c:249:5

#3 0x7ff1c5b43229 in __rec_split_write src/reconcile/rec_write.c:2204:9

#4 0x7ff1c5b44962 in __wt_rec_split_finish src/reconcile/rec_write.c:1706:13

#5 0x7ff1c5b299de in __wt_rec_row_leaf src/reconcile/rec_row.c:1002:11

#6 0x7ff1c5b3fb73 in __reconcile src/reconcile/rec_write.c:258:9

#7 0x7ff1c5b3eeb2 in __wt_reconcile src/reconcile/rec_write.c:98:11

#8 0x7ff1c5a596f4 in __evict_review src/evict/evict_page.c:731:9

 #9 0x7ff1c5a573e1 in __wt_evict src/evict/evict_page.c:168:5

#10 0x7ff1c5a47b9d in __evict_page src/evict/evict_lru.c:2334:5

#11 0x7ff1c5a4431a in __evict_lru_pages src/evict/evict_lru.c:1150:20

--- a/src/evict/evict_page.c

+++ b/src/evict/evict_page.c

@@ -760,10 +760,17 @@ __evict_review(WT_SESSION_IMPL *session, WT_REF *ref, uint32_t evict_flags, bool

       !__wt_page_is_modified(page) || LF_ISSET(WT_REC_HS | WT_REC_IN_MEMORY) ||

         WT_IS_METADATA(btree->dhandle));

     /* Fail 0.1% of the time. */

     if (!closing &&

       __wt_failpoint(session, WT_TIMING_STRESS_FAILPOINT_EVICTION_FAIL_AFTER_RECONCILIATION, 10))

         return (EBUSY);

     return (0);

 }