Set vsync on window creation when using GLES3

[clayjohn]

This is necessary so that the vsync settings actually take effect when the scene is loaded. This is what we did in 3.x as well. We just missed this as OpenGL wasn't available when we overhauled vsync for 4.0.

Also adds vsync to Windows platform.

Tested on Windows and Linux

[akien-mga]

Thanks!

[Lateasusual]

This causes a segmentation fault on startup for me on linux, nvidia drivers (520.56.06)

Thread 1 "godot.linuxbsd." received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()
(gdb) bt
#0  0x0000000000000000 in ?? ()
#1  0x0000555555ff7e2f in GLManager_X11::set_use_vsync(bool) ()
#2  0x0000555555fd6b14 in DisplayServerX11::window_set_vsync_mode(DisplayServer::VSyncMode, int) ()
#3  0x0000555555fe395a in DisplayServerX11::_create_window(DisplayServer::WindowMode, DisplayServer::VSyncMode, unsigned int, Rect2i const&) ()
#4  0x0000555555fec3cc in DisplayServerX11::DisplayServerX11(String const&, DisplayServer::WindowMode, DisplayServer::VSyncMode, unsigned int, Vector2i const*, Vector2i const&, Error&) ()
#5  0x0000555555fed3ff in DisplayServerX11::create_func(String const&, DisplayServer::WindowMode, DisplayServer::VSyncMode, unsigned int, Vector2i const*, Vector2i const&, Error&) ()
#6  0x000055555600e604 in Main::setup2(unsigned long) ()
#7  0x00005555560170f3 in Main::setup(char const*, int, char**, bool) ()
#8  0x0000555555fba40b in main ()

[clayjohn]

@Lateasusual Can you please test out #68714 and see if that fixes the issue for you? I am not able to reproduce the crash, but I noticed some suspicious code (or lack thereof) when comparing the vsync code with the 3.x equivalent.