kernels: make kernels version check a validator

[danieldk]

This check the kernel version already when just the metadata is loaded (fail early). Also make it raise an exception and not a warning. If the kernel uses a feature that is not supported by the kernels version, it is not going to work, so we should just raise. Avoids downloading the whole kernel and then having it fail with a hard to understand exception.

[HuggingFaceDocBuilderDev]

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[github-actions]

Coverage report — kernels/

Measured on: Python 3.10 / Torch 2.13.0.
Other CI configurations are not included in this number.
Hardware-gated code paths (ROCm/XPU/NPU/Darwin/Windows) are excluded or unreachable on the Linux+CUDA runner.

Total coverage: 86.8% — threshold: 80% — ✅

Per-file breakdown

Name	Stmts	Miss	Cover	Missing
src/kernels/__init__.py	14	0	100%
src/kernels/_system.py	6	1	83%	10
src/kernels/_versions.py	78	9	88%	47, 53-54, 57-58, 97, 119, 130, 136
src/kernels/archs.py	56	1	98%	95
src/kernels/backends.py	212	62	71%	40, 44, 48-51, 68, 90, 108, 117, 121, 125-127, 148, 157, 161, 165-167, 188, 199, 201, 208-211, 224, 228, 232-252, 260, 283-303
src/kernels/compat.py	8	1	88%	5
src/kernels/deps.py	103	2	98%	59, 132
src/kernels/hf_hub.py	62	3	95%	18, 20, 114
src/kernels/importer.py	57	5	91%	112, 116, 119, 133-134
src/kernels/install.py	21	7	67%	78-102
src/kernels/layer/__init__.py	6	0	100%
src/kernels/layer/_interval_tree.py	103	4	96%	23, 52, 147, 150
src/kernels/layer/device.py	48	14	71%	42, 47-49, 91, 96-98, 101, 149, 152, 155-157
src/kernels/layer/func.py	87	6	93%	91, 122, 194, 314, 340, 368
src/kernels/layer/globals.py	5	0	100%
src/kernels/layer/kernelize.py	74	8	89%	255, 281, 289-290, 296, 300, 316-318
src/kernels/layer/layer.py	216	15	93%	178, 223, 249, 367, 447-448, 460, 469, 477, 488, 517, 521, 534, 587, 617
src/kernels/layer/mode.py	14	0	100%
src/kernels/layer/repos.py	144	42	71%	27, 33, 36-43, 63-64, 70, 73-76, 90, 94, 103-104, 110, 113-116, 123-124, 130, 133-136, 143-144, 150, 153-156, 163-164, 170, 173-176, 257
src/kernels/load.py	69	2	97%	332, 371
src/kernels/locking.py	89	64	28%	35-83, 91-98, 102-125, 137, 152-159, 165-175, 179-186
src/kernels/python_deps.py	58	6	90%	59-60, 64-65, 101, 104
src/kernels/resolver.py	141	2	99%	182, 188
src/kernels/status.py	49	2	96%	23, 81
src/kernels/variants.py	278	19	93%	64, 95, 116, 146, 255-256, 298-301, 303, 387-394, 400-406, 437-443, 455-461
src/kernels/verify.py	88	1	99%	32
TOTAL	2086	276	87%

Updated by the Test kernels workflow on commit bdd4c518accc761e5aeb7bf967016ff17750949e.

[drbh]

lgtm!