Fix missed collection event to use collection interval

[sethsamuel]

What does this PR do?

Fixes the interval that's used to calculate missed collections for DBM async jobs.

Motivation

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Add the qa/skip-qa label if the PR doesn't need to be tested during QA.
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[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 91.13%. Comparing base (c34f53a) to head (4c6c66d).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

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[datadog-datadog-prod-us1]

⚠️ Tests

⚠️ Warnings

❄️ 2 New flaky tests detected

test_backend_transaction_age from test_pg_integration.py (Datadog)

Needed exactly 0 candidates for 'postgresql.activity.backend_xmin_age', got 1
Expected:
        MetricStub(name='postgresql.activity.backend_xmin_age', type=None, value=None, tags=['app:test_backend_transaction_age', 'database_hostname:stubbed.hostname', 'database_instance:stubbed.hostname', 'db:datadog_test', 'dd.internal.resource:database_instance:stubbed.hostname', 'foo:bar', 'port:5432', 'postgresql_cluster_name:primary', 'postgresql_version:12.17', 'replication_role:master', 'system_identifier:7566296568732680221', 'user:datadog'], hostname=None, device=None, flush_first_value=None)
Difference to closest:


Similar submitted:
Score   Most similar
1.00    MetricStub(name='postgresql.activity.backend_xmin_age', type=0, value=4.0, tags=['app:test_backend_transaction_age', 'database_hostname:stubbed.hostname', 'database_instance:stubbed.hostname', 'db:datadog_test', 'dd.internal.resource:database_instance:stubbed.hostname', 'foo:bar', 'port:5432', 'postgresql_cluster_name:primary', 'postgresql_version:12.17', 'replication_role:master', 'system_identifier:7566296568732680221', 'user:datadog'], hostname='stubbed.hostname', device=None, flush_first_value=False)
0.99    MetricStub(name='postgresql.activity.backend_xmin_age', type=0, value=4.0, tags=['app:datadog-agent', 'database_hostname:stubbed.hostname', 'database_instance:stubbed.hostname', 'db:datadog_test', 'dd.internal.resource:database_instance:stubbed.hostname', 'foo:bar', 'port:5432', 'postgresql_cluster_name:primary', 'postgresql_version:12.17', 'replication_role:master', 'system_identifier:7566296568732680221', 'user:datadog'], hostname='stubbed.hostname', device=None, flush_first_value=False)
...

test_conflicts_snapshot from test_pg_replication.py (Datadog)

Needed at least 1 candidates for 'postgresql.conflicts.snapshot', got 0
Expected:
        MetricStub(name='postgresql.conflicts.snapshot', type=None, value=1, tags=['database_hostname:stubbed.hostname', 'database_instance:stubbed.hostname', 'db:datadog_test', 'dd.internal.resource:database_instance:stubbed.hostname', 'foo:bar', 'port:5434', 'postgresql_version:12.17', 'replication_role:standby'], hostname=None, device=None, flush_first_value=None)
Difference to closest:
        Expected name: postgresql.conflicts.snapshot
        Found postgresql.conflicts.lock

Similar submitted:
Score   Most similar
0.89    MetricStub(name='postgresql.conflicts.lock', type=3, value=1.0, tags=['database_hostname:stubbed.hostname', 'database_instance:stubbed.hostname', 'db:datadog_test', 'dd.internal.resource:database_instance:stubbed.hostname', 'foo:bar', 'port:5434', 'postgresql_version:12.17', 'replication_role:standby'], hostname='stubbed.hostname', device=None, flush_first_value=False)
...

ℹ️ Info

🧪 All tests passed

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