Fix : Prevent viewScriptModule enqueue on admin for blocks

[Vrishabhsk]

• Added a is_admin check before the viewScriptModule scripts are enqueued via wp_enqueue_script_module

Trac ticket: https://core.trac.wordpress.org/ticket/64484

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[sirreal]

This extra condition differs from the view_script_handles block above. I'd like to understand why the behavior is different and requires this change for modules but not for scripts.

[westonruter]

Right, wouldn't it also be applicable for view_script_handles? I'm guessing those scripts are also being erroneously enqueued in the block editor currently.

[sirreal]

This really needs some debugging and an explanation. I don't think this change should move ahead until there's an understanding of why these systems behave differently.

It's possible that there another issue going on, perhaps an issue with scripts, or it may be that this change should also be applied to scripts.