We now use the odoo/tutorials to make the technical onboarding.
- Change the current documentation accordingly.
- Add a section for employees only so that they use odoo-dev/tutorials
as shared fork. It's closer to our way to work so we think it's better
to make them use to it as fast as possible.
- Add some explanations about runbot.
`odoo/technical-training-sandbox` will no longer be used and can be considered deprecated.
closesodoo/documentation#8039
X-original-commit: e60affa6fe
Signed-off-by: Claire Bretton (clbr) <clbr@odoo.com>