pretest_clean: add jit.dis_arm64 LuaJIT built-in

LuaJIT built-in arm64 support for jit utils was introduced via
tarantool/tarantool@93e2ce5
(build: add missing module for jit.dump on ARM64) in Tarantool to
support jit.dump under aarch64 architecture.

Relates to tarantool/tarantool#5983

pretest_clean.lua

@@ -253,6 +253,7 @@ local function clean()
         jit = true,
         ['jit.bc'] = true,
         ['jit.bcsave'] = true,
+        ['jit.dis_arm64'] = true,
         ['jit.dis_x64'] = true,
         ['jit.dis_x86'] = true,
         ['jit.dump'] = true,