test: fix files being left behind (#31004)

test/functional/core/log_spec.lua

@@ -15,6 +15,7 @@ describe('log', function()
 
   after_each(function()
     expect_exit(command, 'qa!')
+    vim.uv.sleep(10) -- Wait for Nvim to fully exit
     os.remove(testlog)
   end)
 

test/functional/legacy/074_global_var_in_viminfo_spec.lua

@@ -150,5 +150,7 @@ describe('storing global variables in ShaDa files', function()
 
   teardown(function()
     os.remove(tempname)
+    command('set shadafile=NONE')
+    os.remove('Xviminfo')
   end)
 end)

test/functional/legacy/078_swapfile_recover_spec.lua

@@ -45,7 +45,7 @@ describe('78', function()
       silent recover Xtest
 
       call delete(g:swapname)
-      new
+      noswapfile new
       call append(0, 'recovery start')
       wincmd w