chore: use trivy-checks to load checks metadata

[nikpivkin]

Related PRs:

• chore: store additional info in metadata trivy-checks#451

Description

This PR changes how check metadata is loaded by switching to the metadata package from trivy-checks. This reduces the number of dependencies and simplifies future migration from AVD-ID to ID-based referencing.

How to test:

• Generate the documentation pages as usual.
• Run a recursive diff between the generated content and the original:

❯ diff -r ~/projects/avd-generator/avd-repo/content/misconfig ~/projects/avd-generator-test/avd-repo/content/misconfig
Only in ~/projects/avd-generator-test/avd-repo/content/misconfig/aws: ami
diff --color -r ~/projects/avd-generator/avd-repo/content/misconfig/aws/api-gateway/avd-aws-0005.md ~/projects/avd-generator-test/avd-repo/content/misconfig/aws/api-gateway/avd-aws-0005.md
2c2
< title: Use Secure TLS Policy
---
> title: Use Secure Tls Policy

As shown above, the only differences are in capitalization (e.g. "TLS" → "Tls") due to the use of a different word casing dictionary. No structural or content-breaking changes are introduced.

For content/compliance only the ID for some checks is changed.

❯ diff -r ~/projects/avd-generator/avd-repo/content/compliance ~/projects/avd-generator-test/avd-repo/content/compliance
diff --color -r ~/projects/avd-generator/avd-repo/content/compliance/kubernetes/CIS Kubernetes Benchmark - RKE2 v1.24-1.24/1.1.10.md ~/projects/avd-generator-test/avd-repo/content/compliance/kubernetes/CIS Kubernetes Benchmark - RKE2 v1.24-1.24/1.1.10.md
29c29
< * [KCV-0057](https://avd.aquasec.com/misconfig/kcv-0057)
---
> * [AVD-KCV-0057](https://avd.aquasec.com/misconfig/avd-kcv-0057)