chore(deps): upgrade metallb (#1597)

Was causing e2e to fail after upgrading QEMU action to 4

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Signed-off-by: Jet Chiang <pokyuen.jetchiang-ext@solo.io>

Author: supreme-gg-gg

scripts/kind/setup-metallb.sh

@@ -4,7 +4,7 @@ set -o errexit
 set -o pipefail
 set -o nounset
 
-METALLB_VERSION=${METALLB_VERSION:-v0.13.7}
+METALLB_VERSION=${METALLB_VERSION:-v0.15.3}
 
 kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/${METALLB_VERSION}/config/manifests/metallb-native.yaml