Add a stack to the statistics resource

[madsbk]

Description

In order to enable more fine-grained statistics, this PR adds a stack to statistics_resource_adaptor

Closes https://github.com/rapidsai/rmm/issues/1332

Checklist

• [x] I am familiar with the Contributing Guidelines.
• [x] New or existing tests cover these changes.
• [x] The documentation is up to date with these changes.

[madsbk]

@harrism and @wence-, the PR is read for a new round of reviews.

I have added a "profiler" decorator that make it easy to profile specific functions. cudf can use it like this: https://github.com/rapidsai/cudf/pull/15866

[wence-]

/merge