fix: fixed plugin dimensions [LIBS-634]

[tomzemp]

See https://dhis2.atlassian.net/jira/software/c/projects/LIBS/issues/LIBS-634

This PR updates the styling around a plugin loaded by a shell:

• plugins that have fixed dimensions: app-shell loads the d2 without any divs/resizing logic
• plugins that have at least one dimension that can resize: load with extra wrapper divs and resizing logic.

Previously, plugins without resizing logic "skipped" the resizing logic (e.g. resizing observer not set up), but I kept (for consistency/simplicity) the extra wrapper divs in the expectation that they would not have issues. From a visual perspective, the wrapper divs don't do anything, but they are apparently preventing highcharts charts from executing their own resizing logic when used in dashboards.

Checked with dashboard/data visualizer, and this new implementation seems to resolve issue:

[dhis2-bot]

:tada: This PR is included in version 11.5.1 :tada:

The release is available on:

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• npm package (@latest dist-tag)
• npm package (@latest dist-tag)
• npm package (@latest dist-tag)
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[dhis2-bot]

:tada: This PR is included in version 12.0.0-alpha.3 :tada:

The release is available on:

• npm package (@alpha dist-tag)
• npm package (@alpha dist-tag)
• npm package (@alpha dist-tag)
• npm package (@alpha dist-tag)
• GitHub release

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