add beam condition for MU/MD 2022 and 2023 based on 103rd LHCb week slides info

Off of the information provided by @falessio at 103 LHCb week, begin preparation of beam conditions for 2023 running.

to be checked explicitly

• given instantaneous luminosity of 2\times10^{-33} cm^{-2} s^{-1}, this still corresponds to nu=7.6? Depends on n colliding bunches which was assumed to be 2400, but is listed as 2376
• VCrossingAngle = -0.200*SystemOfUnits.mrad is taken as fixed This is still OK?
• emmittance changes between 1.8 micron and 2.5 micron. Is taking the mean here ok?
• what changes (if any) are needed per magnet polarity

/cc @kreps @gcorti