SG-41399 - Make sure package installed with custom python are isolated (#1019)

### Make sure package installed with custom python are isolated

### Linked issues
n/a

### Summarize your change.
1) Removed `dohq-artifactory` (not used)
2) Added pip options (same options used in make_python.py):
   1) -s : Don't add user site-packages to sys.path
   2) -E :  Ignore all PYTHON* environment variables
   3) -I : Isolated mode

### Describe the reason for the change.
Some issue where the custom python was seeing the site-packages from the
system python

### Describe what you have tested and on which operating system.
CI

### Add a list of changes, and note any that might need special
attention during the review.

### If possible, provide screenshots.

---------

Signed-off-by: Cédrik Fuoco <[email protected]>

Author: cedrik-fuoco-adsk

cmake/dependencies/python3.cmake

@@ -281,7 +281,7 @@ SET(_requirements_install_command
     ${CMAKE_COMMAND} -E env
     ${_otio_debug_env}
     "CMAKE_ARGS=-DPYTHON_LIBRARY=${_python3_cmake_library} -DPYTHON_INCLUDE_DIR=${_include_dir} -DPYTHON_EXECUTABLE=${_python3_executable}"
-    "${_python3_executable}" -m pip install --upgrade --no-cache-dir --force-reinstall -r "${_requirements_output_file}"
+    "${_python3_executable}" -s -E -I -m pip install --upgrade --no-cache-dir --force-reinstall -r "${_requirements_output_file}"
 )
 
 IF(RV_TARGET_WINDOWS)

requirements.txt

@@ -7,5 +7,4 @@ pyzstd==0.15.9; python_version <= '3.8'  # License: BSD License (BSD-3-Clause)
 pyzstd; python_version > '3.8'           # License: BSD License (BSD-3-Clause)
 py7zr==0.22.0; python_version <= '3.8'   # License: GNU Lesser General  Public License v2 or later (LGPLv2+) (LGPL-2.1-or-later)
 py7zr; python_version > '3.8'            # License: GNU Lesser General  Public License v2 or later (LGPLv2+) (LGPL-2.1-or-later)
-dohq-artifactory                         # License: MIT License (MIT License)
 pre-commit                               # License: MIT License (MIT)