Fix duplicate TARGET_LINK_LIBRARIES and duplicated DISABLE_NLP_ORACLES block

[Omar-Abdo1]

This PR fixes three pre-existing bugs in the CMake build configuration:

1. new_volume_example was linked to lp_solve twice:

   • Once with ${MKL_LINK} (kept)
   • Once without ${MKL_LINK} (removed)

2. volume_cb_vpoly_intersection_vpoly was linked to lp_solve twice:

   • Once without ${MKL_LINK} (removed)
   • Once with ${MKL_LINK} (kept)

3. The entire DISABLE_NLP_ORACLES option block appeared twice
   in the top-level CMakeLists.txt. The duplicate block was removed.

In each case, the line with more libraries was kept to preserve
full MKL and coverage support.

No functional changes — build behavior is identical for all
existing configurations.

[vissarion]

Thanks. Why not unifying the two if statements?

[Omar-Abdo1]

Thanks. Why not unifying the two if statements?

Thanks! Good point , I missed that. I’ll unify the two if blocks.