WithCardinalityLimit should provide per instrument configuration

[codeboten]

Problem Statement

Maybe this is more of a question than feature request. Based on the specification, an on the configuration schema, it's possible to configure cardinality limits for each instrument type. Currently WithCardinalityLimit only supports a single int value.

Proposed Solution

WithCardinalityLimit could receive a struct with the different instrument types.

Alternatives

Alternatively a separate option for each instrument type could be used.

[dmathieu]

The metrics SDK is stable. So we can't change the method signature.
We could however add a second option that allows setting cardinality limits for a set of instrument types.
A struct attribute seems weird for Go. Maybe multiple methods, WithCounterCardinalityLimit, ...?

[petern48]

opened a PR for this: #7855