chore: Add CI tests for pip install without lock file (#2909)

* Add CI tests for pip install without lock file

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* Refactor CI tests to run sequentially instead of parallel matrix

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* Add PyTorch CPU extra-index-url and remove --only-binary flag

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* remove python 3.9

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* use torch-backend option in uv

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* add check that compilation from sources would fail

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* remove dev headers explicitly

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* fix for system python like python 3.12

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

---------

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>