Create a compile+upload combo command

[zmoog]

This PR adds something similar to the IDE’s “compile on upload” feature.

Idea

The intended purpose is to simplify the workflow of the board user and offer a single-step command to compile the sketch and upload to the board.

For example:

$ arduino-cli compile --fqbn arduino:samd:nano_33_iot ~/Arduino/Blink --upload --port /dev/cu.usbmodem14101 --verify

Design & Implementation

I've tried to reuse the existing implementation of both compile and upload command composing them in the Cobra commands.

Since I'm new to both the arduino-cli project and the Go programming language any feedback will be really, really (I mean it!) welcome.

[CLAassistant]

All committers have signed the CLA.

[masci]

Approach is neat and readable 👌, code LGTM.
We'll need to pay attention to ensure flags shared between the two commands don't go out of sync but at this stage IMO it's better a little duplication than an overly complex solution.

[mastrolinux]

Just added a couple of suggestions, I do like the general idea and the Go part.

[zmoog]

We're closing this PR to ship the compile+upload combo and the suggested improvements to the integration tests will be addressed in the dedicated PR (I will link it here as soon created).