Mesh Render Extent Settings

[JanCaha]

Description

This is iteration of #59305 which was changed a lot by introduction of changes in #59444.

This PR brings to renderer for Mesh Contours option to set renderer Min Max based on extent (specific canvas, changing canvas) in the same way as renderers for Raster Layer.

Besides that minimumMaximumActiveScalarDataset( const QgsRectangle &extent, const QgsMeshDatasetIndex &datasetIndex, double &min, double &max ) is added to MeshLayer to obtain Min Max from specific Scalar Dataset Index for given extent.

[github-actions]

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[nyalldawson]

LGTM! @wonder-sk did you want to review this one too?

[qgis-bot]

@JanCaha
This pull request has been tagged as requiring documentation.

A documentation ticket will be opened at https://github.com/qgis/QGIS-Documentation when this PR is merged.

Please update the description (not the comments) with helpful description and screenshot to help the work from documentors.
Also, any commit having [needs-doc] or [Needs Documentation] in will see its message pushed to the issue, so please be as verbose as you can.

Thank you!

[qgis-bot]

@JanCaha

This pull request has been tagged for the changelog.

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[wonder-sk]

I think @uclaros will have a glance on this...

[uclaros]

Nice!
Just a couple of comments

[qgis-bot]

@JanCaha
A documentation ticket has been opened at qgis/QGIS-Documentation#9487
It is your responsibility to visit this ticket and add as much detail as possible for the documentation team to correctly document this change.
Thank you!