Move test_yjit_asm.sh into misc

Since conventionally scripts don't live at the top level of the repo.

.github/workflows/yjit_asm_tests.yml

@@ -1,4 +1,4 @@
-name: x86 assembler tests
+name: YJIT x86 assembler tests
 
 on: [push, pull_request]
 
@@ -19,5 +19,5 @@ jobs:
         with:
           path: src
       - name: Run ASM tests
-        run: ./test_asm.sh
+        run: ./misc/test_yjit_asm.sh
         working-directory: src

doc/yjit/yjit.md

@@ -172,7 +172,7 @@ The YJIT source code is divided between:
 - `yjit_iface.c`: code YJIT uses to interface with the rest of CRuby
 - `yjit.h`: C definitions YJIT exposes to the rest of the CRuby
 - `yjit.rb`: `YJIT` Ruby module that is exposed to Ruby
-- `test_asm.sh`: script to compile and run the in-memory assembler tests
+- `misc/test_yjit_asm.sh`: script to compile and run the in-memory assembler tests
 - `tool/ruby_vm/views/vm.inc.erb`: template instruction handler used to hook into the interpreter
 
 The core of CRuby's interpreter logic is found in: