patch 8.2.0640: Vim9: expanding  does not work

Problem:    Vim9: expanding  does not work.
Solution:   Find wildcards in not compiled commands.  Reorganize test files.
diff --git a/src/testdir/test_vim9_disassemble.vim b/src/testdir/test_vim9_disassemble.vim
index 89ca66f..4e2caf0 100644
--- a/src/testdir/test_vim9_disassemble.vim
+++ b/src/testdir/test_vim9_disassemble.vim
@@ -53,6 +53,32 @@
         res)
 enddef
 
+def s:EditExpand()
+  let filename = "file"
+  let filenr = 123
+  edit the`=filename``=filenr`.txt
+enddef
+
+def Test_disassemble_exec_expr()
+  let res = execute('disass s:EditExpand')
+  assert_match('<SNR>\d*_EditExpand.*' ..
+        ' let filename = "file".*' ..
+        '\d PUSHS "file".*' ..
+        '\d STORE $0.*' ..
+        ' let filenr = 123.*' ..
+        '\d STORE 123 in $1.*' ..
+        ' edit the`=filename``=filenr`.txt.*' ..
+        '\d PUSHS "edit the".*' ..
+        '\d LOAD $0.*' ..
+        '\d LOAD $1.*' ..
+        '\d 2STRING stack\[-1\].*' ..
+        '\d PUSHS ".txt".*' ..
+        '\d EXECCONCAT 4.*' ..
+        '\d PUSHNR 0.*' ..
+        '\d RETURN',
+        res)
+enddef
+
 def s:ScriptFuncPush()
   let localbool = true
   let localspec = v:none