Fixes after renaming branch noetic

[artivis]

No description provided.

[Guillaumebeuzeboc]

The directory for the gadget is turtlebot3c-gadget, while the name of the gadget in the snapcraft.yaml is turtlebot3c-pi: snapcraft.yaml
Shouldn't the name of the directory be turtlebot3c-pi-gadget?

[artivis]

The directory for the gadget is turtlebot3c-gadget, while the name of the gadget in the snapcraft.yaml is turtlebot3c-pi: snapcraft.yaml Shouldn't the name of the directory be turtlebot3c-pi-gadget?

It is not strictly necessary and I'd like to have a common folder name for all branches which simplifies the CI script.

We could also rename all the different gadgets to turtlebot3c-gadget and assume they are differentiated through channels ... Again, not strictly necessary, we can revisit that later.