DBMON-5416 Collect table size metrics for SQLServer

[edengorevoy]

What does this PR do?

This PR adds a configuration option to collect table size metrics, in kibibytes, for SQLserver:

sqlserver.table.row_count
sqlserver.table.total_size
sqlserver.table.used_size
sqlserver.table.data_size

Each is tagged by table, database and schema. We query from sys.dm_db_partition_stats and sys.allocation_units to grab this information.

SELECT 
        t.name AS table_name,
        s.name AS schema_name,
        db_name() AS database_name,
        SUM(p.row_count) AS row_count,
        CAST(SUM(a.total_pages) * 8.0 AS DECIMAL(18,2)) AS total_size,
        CAST(SUM(a.used_pages) * 8.0  AS DECIMAL(18,2)) AS used_size,
        CAST(SUM(a.data_pages) * 8.0  AS DECIMAL(18,2)) AS data_size
    FROM 
        sys.tables t
    INNER JOIN 
        sys.schemas s ON t.schema_id = s.schema_id
    INNER JOIN 
        sys.indexes i ON t.object_id = i.object_id
    INNER JOIN 
        sys.dm_db_partition_stats p ON i.object_id = p.object_id AND i.index_id = p.index_id
    INNER JOIN 
        sys.allocation_units a ON p.partition_id = a.container_id
    GROUP BY 
        t.name, s.name

tempdb is excluded from these metrics.

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

Attention: Patch coverage is 97.87234% with 2 lines in your changes missing coverage. Please review.

Project coverage is 90.47%. Comparing base (d73f66d) to head (444e20e).
Report is 89 commits behind head on master.

Additional details and impacted files

Flag	Coverage Δ
activemq	?
cassandra	?
confluent_platform	?
hive	?
hivemq	?
hudi	?
ignite	?
jboss_wildfly	?
kafka	?
presto	?
solr	?
sqlserver	91.21% <97.87%> (+4.66%)	⬆️
tomcat	?
weblogic	?

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Review from lu-zhengda is dismissed. Related teams and files:

• database-monitoring-agent
  • sqlserver/metadata.csv