rename do_tests shell script as it was hidden by the console scripts with the same name

NEWS.rst

@@ -12,6 +12,8 @@
 
 run_tests: exclude all manifest from coverage, previous exclusion did not apply for installable modules.
 
+Rename do_tests shell script so that it is installed, the console script was shadowing it.
+
 20.2.0
 ------
 

pyproject.toml

@@ -81,7 +81,7 @@
 script-files = [
   "create_archive",
   "create_documentation",
-  "do_tests",
+  "do_tests.zsh",
   "run_tests",
   "start"
 ]