cmNinjaNormalTargetGenerator: don't use `|| true` for link-what-you-use

With the `|| true`, a linker error before running link-what-you-use
would also use the `|| true` fragment and unconditionally succeed. Just
skip the addition since `--lwyu=` ignores the return value anyways.

Fixes #18524

Source/cmNinjaNormalTargetGenerator.cxx

@@ -506,7 +506,6 @@ std::vector<std::string> cmNinjaNormalTargetGenerator::ComputeLinkCmd()
           gt.GetFullPath(cfgName, cmStateEnums::RuntimeBinaryArtifact,
                          /*realname=*/true));
         cmakeCommand += targetOutputReal;
-        cmakeCommand += " || true";
         linkCmds.push_back(std::move(cmakeCommand));
       }
       return linkCmds;