More robustly use effect override internals

[Keno]

The effect override ABI is unstable. The current way it's being used is somewhat problematic: In release mode, it may silently stop working or apply the wrong effects and in debug mode it asserts. Instead, use the julia-level APIs, which have keyword arg constructors that are slightly more stable and will at least error consistently.

[Keno]

@aviatesk

ERROR: LoadError: TypeError: in keyword argument nonoverlayed, expected UInt8, got a value of type Bool
Stacktrace:
   [1] concrete_eval_eligible
     @ ~/.julia/packages/JET/1ZQeA/src/analyzers/jetanalyzer.jl:287 [inlined]
   [2] abstract_call_method_with_const_args(interp::JET.JETAnalyzer{JET.BasicPass}, result::Core.Compiler.MethodCallResult, f::Any, arginfo::Core.Compiler.ArgInfo, si::Core.Compiler.StmtInfo, match::Core.MethodMatch, sv::Core.Compiler.InferenceState, invokecall::Nothing)

on CI, looks like it may be a JET issue?

[aviatesk]

Which CI are you referring to? That error should be resolved in the latest version of JET.