[test] Move cctest/test-disasm-arm64 to unittests/assembler/

... disasm-arm64-unittest.

Bug: v8:12781
Change-Id: I4278eb39e9521bc49b280b22a681f6eb270b80d4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3675901Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Cr-Commit-Position: refs/heads/main@{#80798}

test/cctest/BUILD.gn

@@ -270,7 +270,6 @@ v8_source_set("cctest_sources") {
   } else if (v8_current_cpu == "arm64") {
     sources += [  ### gcmole(arch:arm64) ###
       "test-assembler-arm64.cc",
-      "test-disasm-arm64.cc",
       "test-fuzz-arm64.cc",
       "test-javascript-arm64.cc",
       "test-js-arm64-variables.cc",

test/unittests/BUILD.gn

@@ -496,6 +496,7 @@ v8_source_set("unittests_sources") {
     ]
   } else if (v8_current_cpu == "arm64") {
     sources += [
+      "assembler/disasm-arm64-unittest.cc",
       "assembler/turbo-assembler-arm64-unittest.cc",
       "compiler/arm64/instruction-selector-arm64-unittest.cc",
     ]