`activate/deactivate` command does not pass `$network_wide` as `bool`

Bug Report

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Yes, more specifically, I reviewed the guidelines on how to write clear bug reports.

Describe the current, buggy behavior

When calling wp plugin activate or wp plguin deactivate without explicitly pass --network, $network_wide will be null instead of false.

This causes errors if a plugin uses parameter types like this:

function myplugin_activate( bool $network_wide = false ): void {
	// ...
}

register_activation_hook( __FILE__, 'myplugin_activate' );

Line 311 in 266d53d

$network_wide = Utils\get_flag_value( $assoc_args, 'network' );

Describe how other contributors can replicate this bug

Describe what you would expect as the correct outcome

No errors

Let us know what environment you are running this on

(Paste the output of "wp cli info" into this box)

Provide a possible solution

$network_wide should default to false so it's always a bool

Provide additional context/Screenshots

Add any other context about the problem here.

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I'll look into this issue during the WCEU Contributor day 2023.