[feat] move updater bundle target to a separate field

[Legend-Master]

Describe the problem

About updater configs, I think updater is not really a "target" anymore

Describe the solution you'd like

I would suggest we change our config files a bit, removing updater from bundle targets, instead making it a separate field, like:

updater: true | false | "legacyZipped"

• true: only generates/reuses non-zipped installers/updaters
• legacyZipped: keep the v1 behavior

Alternatives considered

No response

Additional context

No response

[amrbashir]

I think that makes sense but will need an equivalent --updater CLI flag.