[3.x] Initialize GLWrapper earlier in Storage::initialize()

[lawnjelly]

Make sure GLWrapper is initialized before glActiveTexture is called by other parts of the storage initialize(), to prevent benign warnings.

Fixes issue mentioned in #80481 by @harrisyu .

Notes

• This was a search/replace all bug, I didn't realise that glActiveTexture was called before the wrapper was initialized, in the storage initialize. Must have only tested on GLES2.
• Have shifted it back in GLES2 as well as GLES3, to prevent any future recurrence.
• The warnings when starting up GLES3 won't have caused any problems, so they should just be ignored by users until next beta.
• Looking at the merge date I think this was merged just after beta 3, so should only affect users on 3.x dev.

[akien-mga]

Thanks!

[harrisyu]

Thank you !