refactor: Merging go-dep-parser into Trivy

[knqyf263]

Description

The go-dep-parser library was initially developed as a standalone project, separate from Trivy. This design choice was made with several benefits in mind: it aimed to make the library more reusable for other projects, and it was thought that making go-dep-parser independent would facilitate contributions from individuals who use the library without necessarily using Trivy.

However, more than four years have passed, and it has become evident that go-dep-parser is currently used exclusively within Trivy without leveraging the above advantages of being an independent project. On the contrary, integrating go-dep-parser into Trivy could offer similar benefits to those discussed in issue #5626.

Given this context, this proposal suggests integrating go-dep-parser into Trivy. This integration aims to streamline development processes and improve maintenance efficiency. By consolidating our resources, we can enhance the overall functionality and performance of Trivy, ensuring that go-dep-parser contributes more directly to our core objectives.