Hide broken Elements timelock jets

[schoen]

Project

compiler

Describe the feature

Per BlockstreamResearch/simplicity#325, some timelock-related jets in the Elements integration have incorrect semantics and should not be used. The compiler should not generate code to call them, and they should be replaced with correct library functions with the corresponding functionality (possibly with similar names and APIs, but not inside jet::).

[schoen]

@imaginator You're still configured to be auto-assigned for new issues in this repository; I didn't specifically intentionally assign this to you!