[test] Migrate cctest/test-assembler-x64 to unittests/

Bug: v8:12781
Change-Id: I1bf06cd74b82e98f44e00f8d6e9049d1b92c86cb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3827121Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82563}

test/cctest/BUILD.gn

@@ -276,7 +276,6 @@ v8_source_set("cctest_sources") {
     ]
   } else if (v8_current_cpu == "x64") {
     sources += [  ### gcmole(arch:x64) ###
-      "test-assembler-x64.cc",
       "test-log-stack-tracer.cc",
     ]
     if (is_win) {

test/cctest/cctest.status

@@ -219,7 +219,6 @@
 ##############################################################################
 ['asan == True', {
   # Skip tests not suitable for ASAN.
-  'test-assembler-x64/AssemblerX64XchglOperations': [SKIP],
 
   # BUG(v8:7587): Strange breakage on Mac.
   'test-log-stack-tracer/PureJSStackTrace': [SKIP],

test/unittests/BUILD.gn

@@ -598,6 +598,7 @@ v8_source_set("unittests_sources") {
     ]
   } else if (v8_current_cpu == "x64") {
     sources += [
+      "assembler/assembler-x64-unittest.cc",
       "assembler/disasm-x64-unittest.cc",
       "assembler/macro-assembler-x64-unittest.cc",
       "assembler/turbo-assembler-x64-unittest.cc",

test/unittests/unittests.status

@@ -105,6 +105,12 @@
   'Torque.UsingUnderscorePrefixedIdentifierError': [SKIP],
 }],  # system == windows and arch == x64 and mode == release
 
+##############################################################################
+['asan == True', {
+  # Skip tests not suitable for ASAN.
+  'AssemblerX64.AssemblerX64XchglOperations': [SKIP],
+}],  # 'asan == True'
+
 ['tsan == True', {
   # https://crbug.com/v8/9380
   # The test is broken and needs to be fixed to use separate isolates.