Substitute tgz target for one that keeps permissions

[mattermod]

On <MM-21400> we added a setuid permission, this is not being kept by electron-builders target as it is using 7za on linux and does not preserve file permissions.

To overcome this, we need to remove the tgz target from our list and do it within another of the linux targets, reimplementing the feature

In order to get that, the easiest way is to interact with the beforepack scripts and create a different tgz there, or if there are any additional steps during the pack, we can do the same on the after pack, making sure permissions (setuid bit) are kept

HW shell script/easy

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JIRA: https://mattermost.atlassian.net/browse/MM-22377

[esethna]

Thanks William :)

[devinbinnie]

@wget Don't suppose you're still looking at this are you?

[wget]

@devinbinnie Thanks for the nudge. Last time I checked, it was indeed cumbersome to modify the way electron-builder was behaving. Let's seeif the situation changed one year later... or if this suid permission is still needed. Have scheduled this for the week-end.

I have commented for the other pending PR 1405 as well.

[devinbinnie]

@wget Awesome, let me know what you come up with :)

[devinbinnie]

This was resolved in a different PR. Closing.