Add rake task for component diff between versions

[bastelfreak]

This adds a new rake task. It allows us to output the component updates between two provided versions. This is useful for consuming project like openbolt and openvox. They usually skip a few puppet-runtime releases. The new task allows those projects to diff their previous to new puppet-runtime version and get a component overview.

example for the openbolt 5.5.0->5.6.0 release:

bundle exec rake release:changelog_components:diff[2026.04.20.1,2026.06.10.1,false]

**Component Changes:**
| Component | Old Version | New Version |
|-----------|-------------|-------------|
| curl | 8.19.0 | 8.20.0 |
| libxml2 | 2.15.2 | 2.15.3 |
| openssl-3.0 | 3.0.20 | 3.0.21 |
| openssl-3.5 |  | 3.5.7 |
| ruby-4.0 |  | 4.0.5 |
| ruby-selinux | 3.9 | 3.10 |
| ruby-shadow-patched |  | bc7752a9ddbde06c1418734d003a9607bafcc6df |
| rubygem-aws-partitions | 1.1240.0 | 1.1259.0 |
| rubygem-aws-sdk-core | 3.245.0 | 3.251.0 |
| rubygem-aws-sdk-ec2 | 1.612.0 | 1.622.0 |
| rubygem-excon | 1.4.2 | 1.5.0 |
| rubygem-faraday | 2.14.1 | 2.14.2 |
| rubygem-faraday-net_http | 3.4.2 | 3.4.4 |
| rubygem-openfact | 5.6.0 | 5.6.1 |
| rubygem-openvox | 8.26.2 | 8.28.0 |
| rubygem-yard | 0.9.43 | 0.9.44 |

And latest puppet-runtime releases:

$ bundle exec rake release:changelog_components:diff[2026.06.09.1,2026.06.10.1,false]

**Component Changes:**
| Component | Old Version | New Version |
|-----------|-------------|-------------|
| rubygem-aws-partitions | 1.1258.0 | 1.1259.0 |
| rubygem-aws-sdk-ec2 | 1.621.0 | 1.622.0 |
| rubygem-openvox | 8.27.0 | 8.28.0 |

We can also get a list of added components in various projects:

**Component Changes:**
| Component | Old Version | New Version |
|-----------|-------------|-------------|
| curl | 8.19.0 | 8.20.0 |
| libxml2 | 2.15.2 | 2.15.3 |
| openssl-3.0 | 3.0.20 | 3.0.21 |
| openssl-3.5 |  | 3.5.7 |
| ruby-4.0 |  | 4.0.5 |
| ruby-selinux | 3.9 | 3.10 |
| ruby-shadow-patched |  | bc7752a9ddbde06c1418734d003a9607bafcc6df |
| rubygem-aws-partitions | 1.1240.0 | 1.1259.0 |
| rubygem-aws-sdk-core | 3.245.0 | 3.251.0 |
| rubygem-aws-sdk-ec2 | 1.612.0 | 1.622.0 |
| rubygem-excon | 1.4.2 | 1.5.0 |
| rubygem-faraday | 2.14.1 | 2.14.2 |
| rubygem-faraday-net_http | 3.4.2 | 3.4.4 |
| rubygem-openfact | 5.6.0 | 5.6.1 |
| rubygem-openvox | 8.26.2 | 8.28.0 |
| rubygem-yard | 0.9.43 | 0.9.44 |

**Project component additions:**
- openssl-3.5: agent-runtime-main
- ruby-4.0: agent-runtime-main
- ruby-shadow-patched: agent-runtime-main

This is required for the puppet-runtime changelog itself, but not so much in the individual projects, so it's configureable.

Short description

Checklist

I have:

• read the CONTRIBUTING.md document
• read and accepted the Developer Certificate of Origin document and added a Signed-off-by annotation to each of my commits
• read and accepted the AI Policy document and added Generated-by or Assisted-by annotations to each of my commits created with the help of an AI agent
• tested this code
• included documentation (including possible behaviour changes)
• documented the code
• added or modified regression test(s)
• added or modified unit test(s)

[bastelfreak]

I think this is working fine now. I also kicked off a release with the componentoverview branch to verify that the CHANGELOG.md is still correct: #210