mtr: remove not_valgrind_build

The version test on not_valgrind_build.inc was
broken as in BB the sp-no-valgrind.test was
executed.

The implication that it wouldn't work on ASAN
was also incorrect as ASAN tests show it running
fine there.

Correct sp-no-valgrind.test for not_valgrind.inc.

mysql-test/include/not_valgrind_build.inc

-if (`select version() like '%valgrind%' || version() like '%asan%'`)
-{
-  skip Does not run with binaries built with valgrind or asan;
-}

mysql-test/main/sp-no-valgrind.test

 --source include/not_msan.inc
---source include/not_valgrind_build.inc
+--source include/not_valgrind.inc
 
 --echo # MDEV-20699 do not cache SP in SHOW CREATE
 --echo # Warmup round, this might allocate some memory for session variable