Add LIGHTNUCLEI flag, extend pp settings on BEAMTYPE leading to LIGHT…

[shahor02]

…NUCLEI=1

[github-actions]

REQUEST FOR PRODUCTION RELEASES:
To request your PR to be included in production software, please add the corresponding labels called "async-" to your PR. Add the labels directly (if you have the permissions) or add a comment of the form (note that labels are separated by a ",")

+async-label <label1>, <label2>, !<label3> ...

This will add <label1> and <label2> and removes <label3>.

The following labels are available
async-2023-pbpb-apass4
async-2023-pp-apass4
async-2024-pp-apass1
async-2022-pp-apass7
async-2024-pp-cpass0
async-2024-PbPb-apass1
async-2024-ppRef-apass1
async-2024-PbPb-apass2
async-2023-PbPb-apass5

[alibuild]

Error while checking build/O2/fullCI_slc9 for 38d8c98 at 2025-07-16 05:29:

## sw/BUILD/9a3b39e0af42fce8f6b4549231fd54aab95c7cc4-latest/log
command /sw/slc9_x86-64/O2/14517-slc9_x86-64-local1/prodtests/full-system-test/dpl-workflow.sh had nonzero exit code 1

Full log here.

[alibuild]

Error while checking build/O2/fullCI_slc9 for 03f85ca at 2025-07-16 12:01:

No log files found

Full log here.

[shahor02]

tested locally