With bazel 8.x these are strongly encouraged, and this disambiguates
which version of these rules we get for older versions. Specifically the
native.py_test was using the wrong version of py_test.
In python3.11 there is a new environment variable PYTHONSAFEPATH which
stops python from setting the current directory as the first entry in
sys.path. Bazel started setting this to ensure that python targets
don't accidentally access things that aren't in their dependency tree.
This resulted in lit tests breaking because sys.path didn't include the
directory to the lit source files. This is fixed by adding the lit
binary to the dependency tree and propagating the import path from it.
Fixes https://github.com/llvm/llvm-project/issues/75963
Wrap implicit dependencies in Label() so that they refer to @llvm-project, see https://bazel.build/rules/lib/Label#Label.
This change allows lit_test() to be used from other bazel repositories.
Add BUILD.bazel files for most of the MLIR tests and lit tests itself.
Reviewed By: mehdi_amini
Differential Revision: https://reviews.llvm.org/D133455
