[tests] Cleanup tests that use assertOptimized()/assertUnoptimized().

test/mjsunit/compiler/concurrent-invalidate-transition-map.js

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 // Flags: --track-fields --track-double-fields --allow-natives-syntax
 // Flags: --concurrent-recompilation --block-concurrent-recompilation
+// Flags: --no-always-opt
 
 if (!%IsConcurrentRecompilationSupported()) {
   print("Concurrent recompilation is disabled. Skipping this test.");
   quit();
 }
 
 function new_object() {
   var o = {};
   o.a = 1;
   o.b = 2;
@@ skipping 15 matching lines @@
 // Invalidate transition map after compile graph has been created.
 o.c = 2.2;
 // In the mean time, concurrent recompiling is still blocked.
 assertUnoptimized(add_field, "no sync");
 // Let concurrent recompilation proceed.
 %UnblockConcurrentRecompilation();
 // Sync with background thread to conclude optimization that bailed out.
 assertUnoptimized(add_field, "sync");
 // Clear type info for stress runs.
 %ClearFunctionTypeFeedback(add_field);