fix for conda install of selenium-manager (SeleniumHQ#12536)

* 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

* fix linting error

* use conda bin folder, rather than searching PATH

* fix for tox/linting error

py/selenium/webdriver/common/selenium_manager.py

@@ -16,6 +16,7 @@
 # under the License.
 import json
 import logging
+import os
 import subprocess
 import sys
 from pathlib import Path
@@ -53,6 +54,10 @@ def get_binary() -> Path:
 
         path = Path(__file__).parent.joinpath(directory, file)
 
+        if not path.is_file() and os.environ["CONDA_PREFIX"]:
+            # conda has a separate package selenium-manager, installs in bin
+            path = Path(os.path.join(os.environ["CONDA_PREFIX"], "bin", file))
+            logger.debug(f"Conda environment detected, using `{path}`")
         if not path.is_file():
             raise WebDriverException(f"Unable to obtain working Selenium Manager binary; {path}")