DOC: update benchmarking docs to use dev.py user interface (scipy#16633)

The runtest.py module is being phased out in favor of the dev.py module.
Replaced "--bench" with "bench" for running all benchmarks, and "bench -t" for running specific benchmarks.

* BENCH: fix `dev.py bench --compare` so it works correctly (`meson-python` was missing)

Also update the doc command for it

[skip ci]

Co-authored-by: Henry Cuzco <40706933+uiucmeche1317@users.noreply.github.com>
Co-authored-by: Ralf Gommers <ralf.gommers@gmail.com>

Author: hfactor13

benchmarks/asv.conf.json

@@ -42,6 +42,7 @@
         "pytest": [],
         "pythran": [],
         "pybind11": [],
+        "meson-python": [],
     },
 
     // The directory (relative to the current directory) that benchmarks are

dev.py

@@ -850,7 +850,7 @@ def scipy_bench(cls, args):
 
     @classmethod
     def run(cls, **kwargs):
-        """run benchamark"""
+        """run benchmark"""
         kwargs.update(cls.ctx.get())
         Args = namedtuple('Args', [k for k in kwargs.keys()])
         args = Args(**kwargs)

doc/source/dev/contributor/benchmarking.rst

@@ -92,9 +92,9 @@ submitting a pull request.
 To run all benchmarks, navigate to the root SciPy directory at the
 command line and execute::
 
-   python runtests.py --bench
+   python dev.py bench
 
-where ``--bench`` activates the benchmark suite instead of the test
+where ``bench`` activates the benchmark suite instead of the test
 suite. This builds SciPy and runs the benchmarks. (*Note: this could
 take a while. Benchmarks often take longer to run than unit tests, and
 each benchmark is run multiple times to measure the distribution in
@@ -104,17 +104,17 @@ To run benchmarks from a particular benchmark module, such as
 ``optimize_linprog.py``, simply append the filename without the
 extension::
 
-   python runtests.py --bench optimize_linprog
+   python dev.py bench -t optimize_linprog
 
 To run a benchmark defined in a class, such as ``KleeMinty`` from
 ``optimize_linprog.py``::
 
-   python runtests.py --bench optimize_linprog.KleeMinty
+   python dev.py bench -t optimize_linprog.KleeMinty
 
 To compare benchmark results between the active branch and another, such
 as ``main``::
 
-   python runtests.py --bench-compare main optimize_linprog.KleeMinty
+python dev.py bench --compare main  # select again by `-t optimize_linprog`
 
 All of the commands above display the results in plain text in the
 console, and the results are not saved for comparison with future