test(windows): unskip working tests (#25153)

Also simplify home detection with os_homedir()

test/functional/lua/fs_spec.lua

@@ -1,4 +1,5 @@
 local helpers = require('test.functional.helpers')(after_each)
+local uv = require('luv')
 
 local clear = helpers.clear
 local exec_lua = helpers.exec_lua
@@ -288,11 +289,12 @@ describe('vim.fs', function()
       eq('/', exec_lua [[ return vim.fs.normalize('/') ]])
     end)
     it('works with ~', function()
-      eq( exec_lua([[
-      local home = ...
-      return home .. '/src/foo'
-      ]], is_os('win') and vim.fs.normalize(os.getenv('USERPROFILE')) or os.getenv('HOME')
-      ) , exec_lua [[ return vim.fs.normalize('~/src/foo') ]])
+      eq(
+        exec_lua([[
+          local home = ...
+          return home .. '/src/foo'
+        ]], vim.fs.normalize(uv.os_homedir())),
+        exec_lua [[ return vim.fs.normalize('~/src/foo') ]])
     end)
     it('works with environment variables', function()
       local xdg_config_home = test_build_dir .. '/.config'

test/functional/terminal/edit_spec.lua

@@ -36,7 +36,6 @@ describe(':edit term://*', function()
   end)
 
   it("runs TermOpen early enough to set buffer-local 'scrollback'", function()
-    if helpers.skip(helpers.is_os('win')) then return end
     local columns, lines = 20, 4
     local scr = get_screen(columns, lines)
     local rep = 97