feat(nemo): add Nemo backend without Python version pins (#8438)

* Initial plan

* Remove Python version pins from nemo backend install.sh

Co-authored-by: mudler <2420543+mudler@users.noreply.github.com>

* Pin pyarrow to 20.0.0 in nemo requirements

Co-authored-by: mudler <2420543+mudler@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: mudler <2420543+mudler@users.noreply.github.com>

Author: Copilot

backend/python/nemo/install.sh

@@ -14,8 +14,4 @@ if [ "x${BUILD_PROFILE}" == "xintel" ]; then
     EXTRA_PIP_INSTALL_FLAGS+=" --upgrade --index-strategy=unsafe-first-match"
 fi
 
-PYTHON_VERSION="3.12"
-PYTHON_PATCH="12"
-PY_STANDALONE_TAG="20251120"
-
 installRequirements

backend/python/nemo/requirements.txt

@@ -3,3 +3,4 @@ protobuf
 certifi
 packaging==24.1
 setuptools
+pyarrow==20.0.0