[CPDEV-105248] - Remove 1.25 kubernetes version

[Imadzuma]

Description

• Remove 1.25 kubernetes from support;
• Update default kubernetes version from 1.26.11 to 1.28.12;
• Provide inventory patch for kubernetes version;

Test Cases

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration.

TestCase 1: default kubernetes version

Test Configuration:

• Hardware:
• OS:
• Inventory: no kubernetes version specified in cluster.yaml

Steps:

1. Run kubmarine install

Results:

Before	After
The 1.26.11 kubernetes version will be installed	The 1.28.12 kubernetes version will be installed

TestCase 2: old kubernetes version

Test Configuration:

• Hardware:
• OS:
• Inventory: 1.25 kubernetes version specified in cluster.yaml

Steps:

1. Run kubmarine install

Results:

Before	After
Successfull intallation	Installation fails, because 1.25 version is not supported

TestCase 3: patch
Test Configuration:

• Hardware:
• OS:
• Inventory: no kubernetes version specified in cluster.yaml

Steps:

1. Run kubmarine install with previous kubemarine version;
2. Run kubemarine migrate_kubemarine with curent kubemarine version;

Results:

Before	After
Not applicable	1.26.11 kubernetes version is installed
Not applicable	1.26.11 kubernes version is applied in cluster.yaml after patch

Checklist

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Integration CI passed
• Unit tests. If Yes list of new/changed tests with brief description
• There is no merge conflicts

Unit tests

Indicate new or changed unit tests and what they do, if any.