Synchronize master branch with 2024-patches

Includes:

• Prepare Allen v4r16 (!1806 (merged))
• Add loose reference run He/D2 sequence (!1800 (merged))
• Add veloSP ppref sequence with tight MB prescale (!1802 (merged))
• Update HLT1 PbPb sequence for 2024 ion run (!1719 (merged))
• Add sequences for pp reference run TCKs (!1795 (merged))
• Rename HLT1 line names in pp Routing Bits (!1796 (merged))
• Release notes for v4r15 (!1797 (merged))