Fix executionInformation in config export result

[SteveL-MSFT]

PR Summary

Noticed during my demo that executionInformation wasn't being filled infor export.

• Added executionInformation to the export result
• Added executionInformation to each resource within the export
• Fixed camelCasing of executionInformation in a few places
• Added test

[Copilot]

Pull request overview

This PR fixes missing/incorrect executionInformation in configuration export output so exported configs (and exported resources within them) include execution metadata in the expected camelCase shape.

Changes:

• Plumbs ExecutionInformation into the config export flow and attaches it to exported resources and the exported configuration document.
• Updates serde casing behavior in config document types to ensure executionInformation (and related fields) serialize as camelCase.
• Adds a Pester test validating executionInformation is present in dsc config export results.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
lib/dsc-lib/src/configure/mod.rs	Passes/sets execution info during config export and per exported resource.
lib/dsc-lib/src/configure/config_doc.rs	Adjusts serde casing rules to camelCase for config doc structs (fixes executionInformation casing).
dsc/tests/dsc_config_export.tests.ps1	Adds test coverage asserting execution information appears in config export output.
dsc/src/resource_command.rs	Updates resource export path to compile with new helper signature by passing ExecutionInformation.

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