semLambda removed, semProcAux reworked (#17379)

* simplified proc-like name ident to symbol code

* wip - reworking generic param sem

* wip - closer to removing nkEmpty generic params

* it's hacky but tests pass

* slowly tweaking semProcAux to take on semLambda

* fix pragma superset check proto vs current

* Set the symbol owner earlier

* partial progress reworking proto

found bug where default values between forward and impl lead to overload
resolution issues.

* simplified pragma handling and callConv checks

Co-authored-by: Clyybber <Clyybber@users.noreply.github.com>

* partially working

* cgexprs issue

* It works!

* comment clean-up

* clean-up asserts, comments, and other bits

* add isGenericParams, inline isGeneric queries

* seeing if this is sufficiently consistent
* can use this approach or continue it in a further PR

* commentary about nullary generics and clean-ups

* fixed a mistake in PNode isGenericRoutine

* Some small cleanups

* Small cleanup

* for func lambdas ensure we use lambda pragmas

* add some basic compileTime func tests

* [ci skip] remove comments

Co-authored-by: Clyybber <Clyybber@users.noreply.github.com>
Co-authored-by: Clyybber <darkmine956@gmail.com>

compiler/lookups.nim

@@ -287,6 +287,7 @@ proc ensureNoMissingOrUnusedSymbols(c: PContext; scope: PScope) =
 
 proc wrongRedefinition*(c: PContext; info: TLineInfo, s: string;
                         conflictsWith: TLineInfo) =
+  ## Emit a redefinition error if in non-interactive mode
   if c.config.cmd != cmdInteractive:
     localError(c.config, info,
       "redefinition of '$1'; previous declaration here: $2" %