Advisors: Extend MongoDB checks with ability to use data from getDiagnosticData and replSetGetStatus

The problem: 

Some data points needed for the new checks are not metrics, so Exporters do not capture them. But they are essential for the creation of good quality checks.

The ability to get data from getDiagnosticData and replSetGetStatus from checks themself can solve this limitation.

UX: 

• just an additional type in check format 

Acceptance criteria:

• TBD
• New commands reflected in Check documentation

Out Of Scope:

• TBD
• Custom/flexible commands

How to test:

• In attachment two yml files to test replSetGetStatus and getDiagnosticData commands
• New check types work only with pmm-agent version >=2.27. Since we don't have it yet, env PMM_RELEASE_VERSION should be set to 2.27.0 before assembly binaries
• replSetGetStatus doesn't work against non-replicated DBs
• Provided checks from files generates results with warning (Major) severity to ensure the checks work