[K/N][Tests] Change assertions and runtime assertions modes to default, when optimizationMode=OPT

^KT-64844 Fixed

compiler/testData/codegen/box/assert/alwaysEnable.kt

@@ -2,6 +2,7 @@
 // IGNORE_BACKEND: JS_IR
 // IGNORE_BACKEND: JS_IR_ES6
 // IGNORE_BACKEND: JS
+// IGNORE_NATIVE: optimizationMode=OPT
 // ASSERTIONS_MODE: always-enable
 // WITH_STDLIB
 

compiler/testData/codegen/box/fileCheck/redundant_safepoints.kt

@@ -1,9 +1,6 @@
 // TARGET_BACKEND: NATIVE
 // FILECHECK_STAGE: RemoveRedundantSafepoints
 
-// KT-64844
-// IGNORE_NATIVE: target=linux_x64 && optimizationMode=OPT
-
 // This test checks:
 // - there is only one safepoint per function
 // - safepoint function is inlined in OPT mode, unless SMALLBINARY is needed (for ex, watchos_arm32)