console.lua: use native clipboard property on win32 and wayland

Since native clipboard is implemented on win32 and wayland,
use the clipboard property instead.

This fixes the problems with commandline implementations of clipboard:
- On win32, the powershell implementation is complex, and it can take
  several seconds to run for the first time.
- On wayland, it requires wl-paste to be installed, which isn't always
  available. It also works poorly on GNOME.

player/lua/console.lua

@@ -1096,6 +1096,10 @@ local function get_clipboard(clip)
             return res.stdout
         end
     elseif platform == 'wayland' then
+        -- Wayland clipboard is only updated on window focus
+        if clip and mp.get_property_native('focused') then
+            return mp.get_property('clipboard/text', '')
+        end
         local res = utils.subprocess({
             args = { 'wl-paste', clip and '-n' or  '-np' },
             playback_only = false,
@@ -1104,30 +1108,7 @@ local function get_clipboard(clip)
             return res.stdout
         end
     elseif platform == 'windows' then
-        local res = utils.subprocess({
-            args = { 'powershell', '-NoProfile', '-Command', [[& {
-                Trap {
-                    Write-Error -ErrorRecord $_
-                    Exit 1
-                }
-
-                $clip = ""
-                if (Get-Command "Get-Clipboard" -errorAction SilentlyContinue) {
-                    $clip = Get-Clipboard -Raw -Format Text -TextFormatType UnicodeText
-                } else {
-                    Add-Type -AssemblyName PresentationCore
-                    $clip = [Windows.Clipboard]::GetText()
-                }
-
-                $clip = $clip -Replace "`r",""
-                $u8clip = [System.Text.Encoding]::UTF8.GetBytes($clip)
-                [Console]::OpenStandardOutput().Write($u8clip, 0, $u8clip.Length)
-            }]] },
-            playback_only = false,
-        })
-        if not res.error then
-            return res.stdout
-        end
+        return mp.get_property('clipboard/text', '')
     elseif platform == 'darwin' then
         local res = utils.subprocess({
             args = { 'pbpaste' },