[lld] [ELF] Implement --force-group-allocation (PR #94704)

[Fangrui Song via llvm-commits]

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@@ -1384,6 +1384,9 @@ static void readConfigs(opt::InputArgList &args) {
   config->relaxGP = args.hasFlag(OPT_relax_gp, OPT_no_relax_gp, false);
   config->rpath = getRpath(args);
   config->relocatable = args.hasArg(OPT_relocatable);
+  config->resolveGroups = !args.hasArg(OPT_relocatable) ||
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MaskRay wrote:

I was thinking that `--inhibit-group-allocation` could be kept to document the default behavior. I agree that it's not useful and I will remove it.

https://github.com/llvm/llvm-project/pull/94704