v1.25.3 draft

[GeckoEidechse]

Changes:
Use static MSVC Runtime Library (Launcher#718)
Restructure primelauncher cmake logic (Launcher#727)

Fixes:
Add overrides to custom_sink_it_ methods (Launcher#708)
Fix memalloc problems (Launcher#728)
Fix const-qualified assignment in RapidJSON (Launcher#717)

Contributors:
@Jan200101