pytester: runpytest_inprocess: print command/cwd

This brings it in line with what is done in `run` /
`runpytest_subprocess`.

Author: blueyed

doc/5107.improvement.rst

@@ -0,0 +1,3 @@
+``testdir.runpytest_inprocess`` now prints the command and current working
+directory, bringing it in line with
+``testdir.run`` / ``testdir.runpytest_subprocess``.

src/_pytest/pytester.py

@@ -854,6 +854,8 @@ def runpytest_inprocess(self, *args, **kwargs) -> RunResult:
         """
         syspathinsert = kwargs.pop("syspathinsert", False)
 
+        print("running (inline): pytest", *args)
+        print("              in:", py.path.local())
         if syspathinsert:
             self.syspathinsert()
         now = time.time()