test(old): add more missing test files and run more tests alone

Copy four files from Vim v8.2.1432.
Try to match Vim's test_alot.vim.
This marks Vim patch 8.2.0164 as ported:

vim-patch:8.2.0164: test_alot takes too long

Problem:    Test_alot takes too long.
Solution:   Run several tests individually.
https://github.com/vim/vim/commit/842931cd7af37ea95e826b7a93a5d5587d18c9bb

1 files changed, 0 insertions, 43 deletions

diff --git a/test/functional/legacy/file_perm_spec.lua b/test/functional/legacy/file_perm_spec.lua
deleted file mode 100644
index ccdbfe0534..0000000000
--- a/test/functional/legacy/file_perm_spec.lua
+++ /dev/null
@@ -1,43 +0,0 @@
--- Test getting and setting file permissions.
-require('os')
-
-local helpers = require('test.functional.helpers')(after_each)
-local clear, call, eq = helpers.clear, helpers.call, helpers.eq
-local neq, exc_exec, eval = helpers.neq, helpers.exc_exec, helpers.eval
-
-describe('Test getting and setting file permissions', function()
-  local tempfile = helpers.tmpname()
-
-  before_each(function()
-    os.remove(tempfile)
-    clear()
-  end)
-
-  it('file permissions', function()
-    -- eval() is used to test VimL method syntax for setfperm() and getfperm()
-    eq('', call('getfperm', tempfile))
-    eq(0, eval("'" .. tempfile .. "'->setfperm('r--------')"))
-
-    call('writefile', {'one'}, tempfile)
-    eq(9, eval("len('" .. tempfile .. "'->getfperm())"))
-
-    eq(1, call('setfperm', tempfile, 'rwx------'))
-    if helpers.is_os('win') then
-      eq('rw-rw-rw-', call('getfperm', tempfile))
-    else
-      eq('rwx------', call('getfperm', tempfile))
-    end
-
-    eq(1, call('setfperm', tempfile, 'r--r--r--'))
-    eq('r--r--r--', call('getfperm', tempfile))
-
-    local err = exc_exec(('call setfperm("%s", "---")'):format(tempfile))
-    neq(err:find('E475:'), nil)
-
-    eq(1, call('setfperm', tempfile, 'rwx------'))
-  end)
-
-  after_each(function()
-    os.remove(tempfile)
-  end)
-end)