Report mobile report row count during restore to datadog

[gherceg]

Product Description

Technical Summary

https://dimagi.atlassian.net/browse/SAAS-15614

We currently don't have insight into the size of mobile reports during restores. This will enable us to monitor the sizes of reports generated during restores, and correlate restore issues with large mobile reports.

Feature Flag

Safety Assurance

Safety story

Automated test coverage

QA Plan

n/a

Rollback instructions

• This PR can be reverted after deploy with no further considerations

Labels & Review

• Risk label is set correctly
• The set of people pinged as reviewers is appropriate for the level of risk of the change

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: corehq/apps/app_manager/fixtures/mobile_ucr.py

Function	Unhandled Issue
report_config_to_fixture	MobileUCRTooLargeException /a/{domain}/phone/rest... Event Count: 12

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