[processing] Harmonize DXF Export app dialog and corresponding algorithm

[gacarrillor]

Follow-up: #56147

• Remember settings for data defined blocks in DXF Export app dialog
• Expose DXF Export's data defined blocks functionality to processing

Fix #56853

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Funded by the QGIS user group Switzerland.

[qgis-bot]

@gacarrillor
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.
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Thank you!

[gacarrillor]

@mhugent, could you please bring the constant we'd talked about in #57036 (comment) to this PR/branch?

[mhugent]

@mhugent, could you please bring the constant we'd talked about in #57036 (comment) to this PR/branch?

Created a PR against the branch in your repo (gacarrillor/QGIS)

[gacarrillor]

Created a PR against the branch in your repo (gacarrillor/QGIS)

Thank you @mhugent!

[gacarrillor]

@mhugent, since this PR fixes #56853, I'd really appreciate your review here.

[mhugent]

Thank you, looks good to me.
The only thing that might be a bit confusing is that in the export dialog, there is 'Output Layer Attribute' and in processing, there is 'Attribute' and 'Output Layer Name'

[gacarrillor]

Thank you, looks good to me. The only thing that might be a bit confusing is that in the export dialog, there is 'Output Layer Attribute' and in processing, there is 'Attribute' and 'Output Layer Name'

Thank you Marco. I guess we should also name it "Output layer attribute" in processing. Would that be enough to give more consistency?

[mhugent]

Thank you Marco. I guess we should also name it "Output layer attribute" in processing. Would that be enough to give more consistency?

Yes, this will be fine

[gacarrillor]

Thank you Marco. I guess we should also name it "Output layer attribute" in processing. Would that be enough to give more consistency?

Yes, this will be fine

Done!

[qgis-bot]

@gacarrillor
A documentation ticket has been opened at qgis/QGIS-Documentation#9045
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!