ci: migrate from wget to curl

Better error handling is more reliable.

Options:
 -L, follow location
 --retry, number of retries
 --retry-all-errors, does not fail on ALL errors, that's why there is -f
 -f, fail fast with no output at all on server errors
 --retry-delay, make curl sleep this amount of time before each retry

Signed-off-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20788>

.gitlab-ci/common/init-stage2.sh

@@ -73,7 +73,8 @@ if [ "$HWCI_KVM" = "true" ]; then
         modprobe ${KVM_KERNEL_MODULE}
 
     mkdir -p /lava-files
-    wget -S --progress=dot:giga -O /lava-files/${KERNEL_IMAGE_NAME} \
+    curl -L --retry 4 -f --retry-all-errors --retry-delay 60 \
+	-o "/lava-files/${KERNEL_IMAGE_NAME}" \
         "${KERNEL_IMAGE_BASE_URL}/${KERNEL_IMAGE_NAME}"
 fi