Expose subscription option on the Client

[devbugging]

Description

This PR change the access.Client event subscription methods so they expose options for subscribing. More specifically setting heartbeat interval. Since this options are not protocol specific (grpc/http) they should be exposed and configurable on the interface type.

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For contributor use:

• [ ] Targeted PR against master branch
• [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• [ ] Code follows the standards mentioned here.
• [ ] Updated relevant documentation
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