Reduce javascript file sizes for faster initial page loading

[tianleh]

Is your feature request related to a problem? Please describe.

During OSD page loading, there are several JavaScript files of size multiple MBs.

using 2.11 as an example.

bundles/osd-ui-shared-deps/osd-ui-shared-deps.js 5.55MB
bundles/osd-ui-shared-deps/[email protected] 4.52MB
bundles/plugin/observabilityDashboards/observabilityDashboards.plugin.js 12.11MB

While these files will cached for subsequent requests, it may cause latency of initial page loading when network is slow.

Describe the solution you'd like

Reduce the size of the JavaScript files. Potentially refactor to smaller files for ease of parallel downloading.

Describe alternatives you've considered

Additional context