remove warningxxxx() from errors.d

[WalterBright]

Start removing all the error message functions that are not derived from ErrorSink. I couldn't go further with this at the moment because #23654 is not merged yet.

[thewilsonator]

warning is still used in LDC

% git grep "warning("
...
gen/abi/abi.cpp:    warning(Loc(),
gen/functions.cpp:    warning(fd->loc,
gen/ldctraits.d:            warning(e.loc, "ignoring arguments for __traits %s", e.ident.toChars());
gen/pgo_ASTbased.cpp:      warning(fd->loc,
gen/pgo_ASTbased.cpp:      warning(fd->loc,
gen/pgo_ASTbased.cpp:      warning(fd->loc, "Error loading profile data for function `%s` (`%s`)",
gen/pragma.cpp:    warning(s->loc,
gen/target.cpp:    warning(Loc(), "unknown properties for target `real` type, relying on D "
gen/uda.cpp:    warning(sle->loc,
gen/uda.cpp:    warning(sle->loc,
gen/uda.cpp:      warning(sle->loc,
gen/uda.cpp:        warning(sle->loc,
gen/uda.cpp:        warning(sle->loc,
gen/uda.cpp:    warning(sle->loc, "ignoring unrecognized calling convention name '%s' for "
gen/uda.cpp:      warning(sle->loc,
...

[WalterBright]

I added a version(LDC)