This PR simplifies Jenkins pytest execution around standard pytest-xdist
behavior.
- Runs each already-filtered CPU/GPU suite once with `-n auto`; the
broad suite keeps load-group scheduling because its order-sensitive
cases require it.
- Removes external sharding, wrapper/profile code, JUnit XML generation
and publication, the skipped-test XML consumer, obsolete suite naming,
and orphaned helpers.
- Retains one inert `task_clear_pytest.sh` entry point only because PR
jobs evaluate their Jenkinsfile from the trusted base branch before
checking out the PR; it performs no cleanup or reporting and can be
removed after this pipeline lands.
- Corrects stale broad-suite paths and explicit target guards, and
migrates a scalar stride test to the current `T.handle` pointer
semantics while preserving its negative lowering check.
- Prevents nested MetaSchedule/XGBoost unit tests from multiplying CPU
fanout without serializing the full suite.
- Builds only the `tvm_runtime` target for the secondary GPU
configuration and removes its unconsumed `gpu2` artifact upload.
The result reduces parallelism to one layer managed by pytest-xdist
while preserving GPU filtering and native failure visibility.
Tianqi Chen
cfb98e938c