[lld] [lld][WebAssembly] Add `--max-memory-growth` (PR #82890)

[via llvm-commits]

SingleAccretion wrote:

> How about adding --[no-]-growable-memory instead?

I'll make the change. To be honest, I just wanted an option name that suggests it being related to `--max-memory` (since it is essentially a different way to specify that maximum memory), but it doesn't matter a great deal.

https://github.com/llvm/llvm-project/pull/82890