Show `Hardened Shoots` DISA STIGs compliance scan results

[JordanJordanov]

What would you like to be added:

• a page in security and compliance section showing shoot spects (for Azure, GCP and AWS) and diki configs which Gardener is using in order to produce the Hardened Shoots diki report
• Copy diki report in a dedicated (html) page visible in the site

Other considerations for the report:

• Use latest Gardener release
• With recommended K8S v
• Against the latest supported DISA STIGs for Kubernetes version
• No need to keep older versions here but we will have them anyways from git
• Remove internal info (e.g. urls from our landscapes), consider opening an internal PR with the changes before the public PR

Why is this needed:

https://www.bestpractices.dev/en/projects/1822?criteria_level=1#security

The project MUST provide an assurance case that justifies why its security requirements are met. The assurance case MUST include: a description of the threat model, clear identification of trust boundaries, an argument that secure design principles have been applied, and an argument that common implementation security weaknesses have been countered. (URL required)

[JordanJordanov]

Latest compliance scan is available at https://gardener.cloud/docs/security-and-compliance/report/