Update Go and gcc versions: (#154)

## Description


The GCC version needed to be updated as it was quite old and was failing to install packages.

## Why is this needed



Fixes: #

## How Has This Been Tested?





## How are existing users impacted? What migration steps/scripts do we need?





## Checklist:

I have:

- [ ] updated the documentation and/or roadmap (if required)
- [ ] added unit or e2e tests
- [ ] provided instructions on how to upgrade

Author: mergify[bot]

syslinux/Dockerfile

@@ -1,7 +1,7 @@
 # syntax=docker/dockerfile:1
 
 # Build syslinux as an syslinux3.86
-FROM gcc:10.2.0 AS syslinux3.86
+FROM gcc:15.1.0 AS syslinux3.86
 RUN apt-get update -y; apt-get install -y nasm build-essential uuid-dev
 RUN wget https://cdn.kernel.org/pub/linux/utils/boot/syslinux/3.xx/syslinux-3.86.tar.gz; tar -xvzf ./syslinux-3.86.tar.gz
 WORKDIR /syslinux-3.86/libinstaller
@@ -14,7 +14,7 @@ RUN gcc -Wp,-MT,ldlinux_bin.o,-MMD,./.ldlinux_bin.o.d -W -Wall -Wstrict-prototyp
 RUN gcc -s -static -o syslinux syslinux.o syslxmod.o bootsect_bin.o ldlinux_bin.o
 
 # Build syslinux
-FROM golang:1.21-alpine AS syslinux
+FROM golang:1.24-alpine AS syslinux
 RUN apk add --no-cache git ca-certificates gcc linux-headers musl-dev
 COPY . /src
 WORKDIR /src/syslinux