ColdCard: massive subtree repo clone occasionally fails #808
Description
See e.g.:
- https://github.com/bitcoin-core/HWI/actions/runs/17455349071/job/49568389074?pr=790 build: use Python 3.10 #790
- https://github.com/bitcoin-core/HWI/actions/runs/17455349071/job/49568389200?pr=790
- https://github.com/bitcoin-core/HWI/actions/runs/17455368899/job/49568975981?pr=791 Add register command for BIP388 policies #791
- https://github.com/bitcoin-core/HWI/actions/runs/17455401999/job/49569246601?pr=793 ledger: handle script path (use SignPsbtYieldedObject) #793
I tried fixing this by cloning it only once, turning that in to a Github asset and downloading the asset for each job that needs it. But I couldn't get it to work, see #805.