[ADD] upgrade/on_premise: Add filestore explanation

[augustoPerez]

Added a note explaining that the filestores from the upgraded database and the production database have to be merged for on-premise upgrade, on both the testing and the production phases

[robodoo]

Pull request status dashboard.

[xpl-odoo]

Nice job! I corrected some typos/grammar issues :)

A couple of general comments:
Could you re-target the PR to use 14.0 as the base instead? I know version numbers are less relevant for upgrade-related matters, but I assume the content you added doesn't only apply from 16.0 onwards. Don't hesitate to ask if you need guidance or want me to take care of it.

Each line should contain 100 characters max, as per the rst guidelines.

[augustoPerez]

Hi @xpl-odoo
Thanks for the review!!
I applied the changes you suggested, thanks for picking up the typos 👍
I just have one doubt about the whitespaces (replied on your comment)

I also retargeted the PR to 14.0. Not sure why it shows conflicts tho, if only one file is modified.
I reset my branch to 14.0, and cherry-pick my commit. It's all the same as 14.0 except for the commit

[xpl-odoo]

Hi @xpl-odoo Thanks for the review!! I applied the changes you suggested, thanks for picking up the typos 👍 I just have one doubt about the whitespaces (replied on your comment)

I also retargeted the PR to 14.0. Not sure why it shows conflicts tho, if only one file is modified. I reset my branch to 14.0, and cherry-pick my commit. It's all the same as 14.0 except for the commit

Did you hard rest? git reset --hard 14.0

It should be fixed now in any case ;)

NB: I merged the two consecutive note blocks into a single one.

[augustoPerez]

Hi @xpl-odoo
Thanks for the changes!!
PR should be ready to merge now 🙂

[xpl-odoo]

@robodoo r+