Cleans up report-viewer.tsx

[Meklo]

Implements suggestions from comments by @jonenst in #2416 and additional improvements, here's a rundown :

• Regroups selectedReportId and selectedReportType under a single state since they are tightly coupled
• Reset reportTreeMap content before recomputing it to avoid possible incoherent state
• Removes selectedReportId from callback dependency array by instead comparing it by its previous state
• Consistently use useCallbacks from handlers sent to report-viewer's child components
• Define a constant for container height offset
• Remove conditional rendering since all were dependent on report which is required to instanciate report-viewer
• Check for parentId value in onLogRowClick to avoid arbitrary string cast when value is possibly null
• Removes useDispatch declaration which was unused

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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