test: fix invalid deserialization

[McPatate]

• fix invalid repositories file deserialization
• install node & python only when needed in ci
• log stdout & stderr of setup & build commands in debug
• update actions to node 20
• when an action is re-run, set LOG_LEVEL to debug
• use helix fork because of ahash version fix: ahash breaking nightly helix-editor/helix#9666
• disable lance because of simd nightly features not being available anymore

[github-actions]

Repository name	Source type	Average hole completion time (s)	Pass percentage
smol-rs/async-executor	github	12.907	60.00%
jaemk/cached	github	40.589	90.00%
tkaitchuck/constrandom	github	0.586	0.00%
tiangolo/fastapi	github	35.866	79.92%
null	null	null	null%
huggingface/huggingface_hub	github	24.157	100.00%
gcanti/io-ts	github	31.453	90.00%
lancedb/lancedb	github	119.210	60.00%
mmaitre314/picklescan	github	6.694	100.00%
simple	local	0.471	100.00%
encode/starlette	github	18.244	89.73%
colinhacks/zod	github	61.408	70.00%

Note: The "hole completion time" represents the full process of:

• copying files from the setup cache directory
• replacing the code from the file with a completion from the model
• building the project
• running the tests