Enable virtio console by default and build e1000 drivers as modules

[rlmenge]

Merge Checklist

All boxes should be checked before merging the PR (just tick any boxes which don't apply to this PR)

• The toolchain has been rebuilt successfully (or no changes were made to it)
• The toolchain/worker package manifests are up-to-date
• Any updated packages successfully build (or no packages were changed)
• Packages depending on static components modified in this PR (Golang, *-static subpackages, etc.) have had their Release tag incremented.
• Package tests (%check section) have been verified with RUN_CHECK=y for existing SPEC files, or added to new SPEC files
• All package sources are available
• cgmanifest files are up-to-date and sorted (./cgmanifest.json, ./toolkit/scripts/toolchain/cgmanifest.json, .github/workflows/cgmanifest.json)
• LICENSE-MAP files are up-to-date (./LICENSES-AND-NOTICES/SPECS/data/licenses.json, ./LICENSES-AND-NOTICES/SPECS/LICENSES-MAP.md, ./LICENSES-AND-NOTICES/SPECS/LICENSE-EXCEPTIONS.PHOTON)
• All source files have up-to-date hashes in the *.signatures.json files
• sudo make go-tidy-all and sudo make go-test-coverage pass
• Documentation has been updated to match any changes to the build system
• Ready to merge

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Summary

Enable virtio console by default - Kconfig
Because we typically service a hypervised environment, load virtio console by default.
More on virtio: https://docs.kernel.org/driver-api/virtio/virtio.html

Make the e1000 x86 configs modules instead of built-in - Kconfig
These drivers are specific for one type of ethernet adapter. Therefore make a module and not built-in by default. The module will be called e1000

Change Log

• Make the e1000 x86 configs modules instead of built-in
• Enable virtio console by default

Does this affect the toolchain?

YES

Associated issues

• https://microsoft.visualstudio.com/OS/_workitems/edit/52468301

Test Methodology

• Pipeline build id:https://dev.azure.com/mariner-org/mariner/_build/results?buildId=650799&view=results
• booted in an Azure VM