Add support for VMware Tanzu Kubernetes Grid Integrated

[cigamit]

This adds support for VMware Tanzu Kubernetes Grid Integrated, thanks to an anonymous donor.
Fix a few issues noted elsewhere.

[Copilot]

Pull request overview

Adds a new “tkgi” (VMware Tanzu Kubernetes Grid Integrated Edition) install path to the Ascender installer, aligning it with the existing platform-specific Ansible task structure and providing accompanying documentation and example config/inventory.

Changes:

• Introduces TKGI-specific Ansible tasks and Kubernetes manifest templates for cluster validation, Ascender install, and Ledger install.
• Updates installer UX/docs/config to recognize k8s_platform: tkgi (README, default config comments, interactive config generator).
• Improves OS-family detection in setup.sh, adds Debian keyring dir setup, and adds a Python Kubernetes client presence check/install.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
setup.sh	Expands OS-family detection, updates OS gating messaging, and adds Python kubernetes client install logic.
README.md	Documents TKGI as a valid k8s_platform option.
playbooks/roles/setup_playbooks/tasks/ascender_credentials_tkgi.yml	Adds TKGI path for waiting on Ascender API readiness via AWX organization existence.
playbooks/roles/ledger_install/templates/ledger_deployment_tkgi.yaml	Adds TKGI Ledger Kubernetes manifest template (secrets/services/ingress/deployments).
playbooks/roles/ledger_install/tasks/ledger_install_tkgi.yml	Adds TKGI Ledger install workflow using kubeconfig context + kubernetes.core modules + Ledger configuration.
playbooks/roles/k8s_setup/tasks/k8s_setup_tkgi.yml	Adds TKGI cluster validation (kubeconfig/context/version/ingress/storage/RBAC) and optional /etc/hosts population.
playbooks/roles/common/vars/main.yml	Extends Debian package mapping to include Debian 11 prerequisites.
playbooks/roles/common/tasks/main.yml	Ensures /etc/apt/keyrings exists for Debian/Ubuntu setup flows.
playbooks/roles/ascender_install/templates/ascender-deployment/ascender-deployment-tkgi.yml	Adds TKGI Ascender AWX CR + secrets template with ingress class/annotations support.
playbooks/roles/ascender_install/tasks/ascender_install_tkgi.yml	Adds TKGI Ascender install workflow (operator apply, CR apply, optional Postgres patching).
docs/installation/tkgi/tkgi.inventory	Provides example TKGI inventory.
docs/installation/tkgi/tkgi.custom.config.yml	Provides example TKGI config values and TKGI-specific knobs.
docs/installation/tkgi/README.md	Adds TKGI installation guide and prerequisites.
default.config.yml	Updates inline documentation to include tkgi among platform options.
config_vars.sh	Adds tkgi to interactive platform selection and related prompts (e.g., /etc/hosts, TLS inputs).

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[Copilot]

Pull request overview

Copilot reviewed 22 out of 22 changed files in this pull request and generated 3 comments.

[Copilot]

Pull request overview

Copilot reviewed 22 out of 22 changed files in this pull request and generated 6 comments.