[lib] Replace sendReports keyserver call with Reports service

Summary:
Call the function in the Reports service instead of the keyserver.
The higher-order-function for callServerEndpoint will be removed in the next diff.

Depends on D9042

Test Plan:
Ensured reporting is enabled in settings, then:

• On native, went to dev options and clicked "Trigger a crash" - got an error report in reports service.
• I sent some multimedia messages to generate media mission reports. They appeared in reports service.

Reviewers: kamil, michal, tomek, inka

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D9043