Split configuration normalization from initial config deployment

[ipspace]

The 'normalize' configuration is deployed as a separate step before the initial device configuration to ensure that the Ansible-controlled devices get normalized configuration before the initial configuration is deployed with configuration scripts.

Closes #3319

[Copilot]

Pull request overview

This PR changes the netlab initial workflow so device “normalize” configuration is deployed as a distinct step before initial/module/custom deployment, ensuring Ansible-managed devices get normalized before any provider-specific configuration scripts run (fixing #3319).

Changes:

• Adds an explicit “normalize” deployment phase (and an Ansible netlab_normalize inventory group + normalize-config.ansible playbook).
• Extends netlab initial CLI with --normalize and --dry-run, and wires dry-run logging into parts of the initial flow.
• Updates documentation to reflect the new normalization step and new CLI flags.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
netsim/outputs/ansible.py	Adds netlab_normalize inventory group membership based on features.initial.normalize.
netsim/devices/iosvl2.yml	Marks IOSvL2 as requiring initial.normalize.
netsim/cli/initial/utils.py	Adds --normalize / --dry-run CLI flags and changes deployment list logic for normalize-only runs.
netsim/cli/initial/ready.py	Adds partial dry-run handling for internal readiness checks.
netsim/cli/initial/deploy.py	Splits normalize deployment from the rest; adds dry-run logging; introduces normalize-config.ansible execution path.
netsim/cli/initial/__init__.py	Enables global dry-run flag via set_dry_run(args).
netsim/ansible/tasks/initial-config.yml	Removes legacy task file that previously ran normalize+initial.
netsim/ansible/normalize-config.ansible	New playbook for normalization step (hosts netlab_normalize).
netsim/ansible/initial-config.ansible	Inlines initial deployment tasks (no longer imports the removed task file).
docs/netlab/initial.md	Updates docs for the new normalize step and adds --normalize / --dry-run.