Refactor: Remove outdated local /release path and link directly to GitHub Releases

# Description

Currently, there is no UI component that links to the Release page (podman.io/release). The page contains outdated release information and is no longer actively maintained. Additionally, the release folder in the codebase does not provide meaningful value anymore.

# Proposed Solution

1. Remove the unused release/ folder from the codebase
2. Remove the unused release blog configuration from @docusaurus/plugin-content-blog.

``` diff
- ['@docusaurus/plugin-content-blog',
- {
- showReadingTime: true,
- routeBasePath: 'release',
- id: 'release-anouncements',
- path: './release',
- },
- ],
```

3. Update the footer to include a Release link under the projects column or docs to navigate to [https://github.com/podman-container-tools/podman/releases](https://github.com/podman-container-tools/podman/releases)

4. I suggest also remove all releases related blogs in the blogs/ as this also have no value now and outdated also

Start with the Docusaurus blog configuration and footer entry point, then inspect the release/ folder and release-related posts in blogs/. Remove the unused release blog configuration and content, and add a footer or docs link to the specified GitHub Releases page. Done means /release no longer serves outdated content and the new Release link works.

Written by the indexing model from the issue text.