Refactor interface{} to any

[mostafa]

Ticket(s)

Partially related to #397.

Description

Small refactoring to replace interface{} to any.

Related PRs

N/A

Development Checklist

• I have added a descriptive title to this PR.
• I have squashed related commits together.
• I have rebased my branch on top of the latest main branch.
• I have performed a self-review of my own code.
• I have commented on my code, particularly in hard-to-understand areas.
• I have added docstring(s) to my code.
• I have made corresponding changes to the documentation (docs).
• I have updated docs using make gen-docs command.
• I have added tests for my changes.
• I have signed all the commits.

Legal Checklist

• I have read the CONTRIBUTING document.
• I have read and understood the Code of Conduct.
• I have read and agreed to the Apache CLA (required).
• I have read and agreed to the LICENSE (required).

[github-actions]

Overview

Image reference	ghcr.io/gatewayd-io/gatewayd:1ddeba3	gatewaydio/gatewayd:latest
- digest	dece38f228c8	c0d87a848696
- tag	1ddeba3	latest
- provenance		9ec6b54
- vulnerabilities
- platform	linux/amd64	linux/amd64
- size	19 MB	17 MB (-2.2 MB)
- packages	136	132 (-4)
Base Image	alpine:3 also known as: • 3.20 • 3.20.3 • latest	alpine:3.20 also known as: • 3 • 3.20.3 • latest
- vulnerabilities

Packages and Vulnerabilities (5 package changes and 0 vulnerability changes)

• ➖ 3 packages removed
• ♾️ 2 packages changed
• 127 packages unchanged

Changes for packages of type apk (3 changes)

	Package	Version ghcr.io/gatewayd-io/gatewayd:1ddeba3	Version gatewaydio/gatewayd:latest
➖	ca-certificates	20240705-r0
➖	openssl	3.3.2-r0
➖	pax-utils	1.3.7-r2

Changes for packages of type golang (2 changes)

	Package	Version ghcr.io/gatewayd-io/gatewayd:1ddeba3	Version gatewaydio/gatewayd:latest
♾️	github.com/gatewayd-io/gatewayd	(devel)	0.9.8
♾️	stdlib	go1.23.2	1.23.1