Use of dev version sylva-toolbox container make CI jobs fail
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### Summary
When we use a sylva-toolbox development image, for example:
sylva-toolbox/snapshot:0.0.0-git-xxx image
we modify common.sh like:
```
SYLVA_TOOLBOX_VERSION=${SYLVA_TOOLBOX_VERSION:-"0.0.0-git-a2ea56f7"}
SYLVA_TOOLBOX_IMAGE=${SYLVA_TOOLBOX_IMAGE:-container-images/sylva-toolbox/snapshot}
```
2 jobs are failing in sylva-core pipeline:
- check-sylva-toolbox-binaries-version
- calico-check-versions
usually those 2 jobs failure are ignored by developers because there are not blocking deployments
The idea could be to set only the dev version:
```
SYLVA_TOOLBOX_VERSION=${SYLVA_TOOLBOX_VERSION:-"0.0.0-git-a2ea56f7"}
```
and change code to detect it is a dev version and append '/snapshot' everywhere it is required
cc @tmmorin
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issue