feat(fluentbit): Update fluent/fluent-bit to v4 which adds support for structured metadata to the out_loki plugin (#17200)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Christian Haudum <christian.haudum@gmail.com>

Author: renovate[bot]

clients/cmd/fluent-bit/Dockerfile

@@ -14,7 +14,7 @@ RUN go build \
     -o clients/cmd/fluent-bit/out_grafana_loki.so \
     /src/clients/cmd/fluent-bit
 
-FROM fluent/fluent-bit:3.2.10@sha256:d6dec000c4929a439562525728c708f6e99800d7ddc82efd6aa4f45f3a20b562
+FROM fluent/fluent-bit:4.0.0@sha256:3cabd4bd59596931cd99d812c99200e12fa08758fd08dfb0549c96ae97a70ddd
 
 COPY --from=builder /src/clients/cmd/fluent-bit/out_grafana_loki.so /fluent-bit/bin
 COPY clients/cmd/fluent-bit/fluent-bit.conf /fluent-bit/etc/fluent-bit.conf

clients/cmd/fluentd/docker/docker-compose.yml

@@ -24,7 +24,7 @@ services:
 
   # Read /var/log/syslog and send it to fluentd
   fluentbit:
-    image: fluent/fluent-bit:3.2
+    image: fluent/fluent-bit:4.0
     command: "/fluent-bit/bin/fluent-bit -c /srv/fluent-bit.conf"
     user: root
     volumes: