Remove duplicate `ctx`-derived arguments in base analysis

[sim642]

Base analysis is full of code like

set_many ~ctx (Analyses.ask_of_ctx ctx) gs st [...]

where Analyses.ask_of_ctx ctx, gs and st are directly taken from ctx itself. There's no point in having those three arguments because everything could be accessed via the ctx that's already passed around.

This is the case for a lot of code in base, so this would be a major cleanup.

[sim642]

Reopening because many st arguments still remain after #1308 due to possible mismatch between ctx.local and st in the middle of certain operations: #1308 (comment).