fix for conda install of selenium-manager

conda doesn't seem to properly package selenium-manager, so it needs
to be install as a separate package (via conda). But this puts it in
the environment's bin folder.

This commit checks the path for the selenium-manager executable if
it isn't installed in the package's webdriver/common/<platform>/
folder.

fixes SeleniumHQ#11234 and SeleniumHQ#12084

py/selenium/webdriver/common/selenium_manager.py

@@ -19,6 +19,7 @@
 import subprocess
 import sys
 from pathlib import Path
+import shutil
 from typing import List
 
 from selenium.common import WebDriverException
@@ -53,6 +54,9 @@ def get_binary() -> Path:
 
         path = Path(__file__).parent.joinpath(directory, file)
 
+        if not path.is_file():
+            # conda has a separate package selenium-manager, installs in bin folder
+            path = Path(shutil.which(file))
         if not path.is_file():
             raise WebDriverException(f"Unable to obtain working Selenium Manager binary; {path}")