Add 2025 PbPb and cleanup expected-2025

Implements lhcb-simulation/mc-productions-setup#88

Add PbPb for 2 data-types:

• 2025.W46.47
• 2025.W47.49

Remove expected-2025 for all collision types

Merge 2025 reference tests into run3 tests

To-do:

• Verify HLT configuration (particularly the --sequence= flag)
• Update tags when available
• Regenerate all references upon AppConfig v3r460 release
• Add lumi values to lumi.py