feat(hogql): bunch of improvements (HogVM part 1)

[mariusandra]

Problem

The HogQL local evaluation PR (aka HogVM) is getting out of control. I'll split it into at least three. This is part one. It does a bit of cleanup, and adds better regex support.

Changes

• Rename BinaryOperation to ArithmeticOperation
• Standardise LtE to LtEq, and LE to LT_EQ
• Update the database JSON snapshot, and make CI save it going forward
• Instead of not(in(...)) in the printer, use shorthands like notIn() when possible
• Adds support for regex operator ~, =~ and !~.
• Also adds support for case insensitive regex operators ~*, =~* and !~*. We need this separately for local evaluation. ClickHouse uses re2 for regex matching, whereas Python and JS use pcre. Adding our own re2 bindings to the HogVM implementations is possible (~200kb of WASM?), but likely not worth it when we want to keep the bundle size down. E.g. for client side feature flags. A lot of the syntax between both implementations is similar, however a big difference is in how you pass flags. re2 uses (?i) inside the regex, whereas pcre uses a separate modifiers list (like /a/i). Introducing these operators seemed to be the only way to reliably do case-insensitive regex matching both locally and in ClickHouse.
• Removes the cohort(1) function, and instead only support the id in cohort 1 syntax. We're effectively moving from in(id, cohort(1)) to inCohort(id, 1). Nothing really changes for users, this makes cohort matching easier to implement in HogVM, and unlocks further optimisations.

How did you test this code?

Added or updated tests where relevant

[thmsobrmlr]

LGTM