The Netty allocator metrics exposed an `id` label using the allocator hashcode. However, this does not make a lot of sense when you need to aggregate metrics from multiple metrics.
Thus, this commit replaces the `id` with a `name` label with stable names for the different allocators.

Unfortunately, the initial code was in micrometer. This commit forks the 2 classes required to replace `id` with `name` and adds stable names to the different allocators.

• Fixes: https://github.com/quarkusio/quarkus/issues/45847