Source preparation doesn't tell you it needs a non-shallow repo

[PawelWMS]

If you make azldev prep sources with synthetic git history and the git repository you're running from is a shallow clone, the tool attempt to prepare sources and errors with:

Failed to prepare component sources component=rust-serde_stacker error="preparing sources for `rust-serde_stacker`:
failed to generate synthetic history for component `rust-serde_stacker`:
failed to build synthetic commits:
failed to find Affects commits for component `rust-serde_stacker`:
failed to walk commit log:
object not found"

for every touched component.