[core24] BuildPlanner is not reading the project's type correctly

[tigarmo]

Bug Description

The BuildPlanner in feature/craft-application reads a project_type value but the actual value is just type. This breaks builds that have, say, type: base because we end up passing None to get_effective_base()

To Reproduce

Run a project with type: base

Environment

Jammy

snapcraft.yaml

name: build-base-devel
version: '1.0'
summary: build-base-devel
description: Build a base snap with a build-base of devel
confinement: strict

type: base
build-base: devel

# grade must be devel when build-base is devel
grade: devel

parts:
  build-base-devel:
    plugin: nil
    stage-packages: [base-files]

Relevant log output

2024-02-23T22:32:05.2372678Z 2024-02-23 22:32:05 Error restoring google:ubuntu-22.04-64:tests/spread/core-devel/basic (feb232220-419390) : 
2024-02-23T22:32:05.2374371Z -----
2024-02-23T22:32:05.2375457Z + cd ./snap
2024-02-23T22:32:05.2376657Z + snapcraft clean
2024-02-23T22:32:05.2377675Z snapcraft internal error: KeyError('None')
2024-02-23T22:32:05.2379203Z Full execution log: '/root/.local/state/snapcraft/log/snapcraft-20240223-223205.003964.log'

Additional context

No response

[syncronize-issues-to-jira]

Thank you for reporting us your feedback!

The internal ticket has been created: https://warthogs.atlassian.net/browse/CRAFT-2542.

This message was autogenerated

[sergiusens]

Use Field to alias project_type to type