feat: support using os repository to install packages.

[24sama]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Support using os repository to install packages. It needs user to set up the KKMachine or KKMachineTemplate, For example:

1. If we do not configure any fields related to the repository, then capkk will not do anything with the os repository.

apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
kind: KKMachineTemplate
metadata:
  name: 'kk-md-0'
spec:
  template:
    spec:
      roles:
        - control-plane
        - worker

2. Use the os original repository. Update the repository cache first, then install the default necessary packages.

spec:
  template:
    spec:
      roles:
        - control-plane
        - worker
      repository:
        iso: none
        update: true

3. CAPKK detects the os-release info and generates the iso name automatically, downloads the ISO file (from the release page by default), mounts it on /mnt/kubekey/iso/, then uses it as a local repository to install packages.

spec:
  template:
    spec:
      roles:
        - control-plane
        - worker
      repository:
        iso: auto
        update: true

4. Offline environment using custom iso files, 192.168.100.1 is a FTP server.

# KKCluster
spec:
  component:
    host: 192.168.100.1
    overrides:
      - id: rhel
        version: "7"
        arch: arm64
        path: /myiso/rhel7-rpms-arm64.iso
        checksum: xxxxxxxx
---
## KKMachineTemplate
spec:
  template:
    spec:
      roles:
        - control-plane
        - worker
      repository:
        iso: rhel7-rpms-arm64.iso
        update: true

Which issue(s) this PR fixes:

Fixes #

Special notes for reviewers:

Does this PR introduced a user-facing change?

Additional documentation, usage docs, etc.:

[ks-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: 24sama

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[24sama]

/cc @kubesphere/sig-installation

[pixiake]

/lgtm

[ks-ci-bot]

LGTM label has been added.

Git tree hash: 43475167febe96566a0a67fe6bf2798035d1c0a1