Set Android and iOS tests to run over night or on the weekend

## Description

Change the build and test job to run over night or weekend. This means that we will not run this jobs anymore when we push something or merge on master.

This jobs should also be able to be activate manually if needed.

## Additional info

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_{You can find the original issue from GitLab [here](https://gitlab.com/altom/altunity/altunitytester/-/issues/875).}