wgl: fold GLES* extension checking
wgl: fold GLES* extension checking

In reality, any implementation which has EXT_create_context_es2_profile will
also implement EXT_create_context_es_profile, and vice-versa.

Drop the over-verbose checks with a single that works across ES1, ES2 and ES3

Signed-off-by: Emil Velikov <f20878473f414da183da19ee25c8722cc1d711e4@collabora.com>
Tested-by: Dylan Baker <dd378c4ca75f71f527acddef5b43fc35b68d5b7a@pnwbakers.com>

waffle-gl/waffle,waffle-gl/waffle,waffle-gl/waffle,waffle-gl/waffle