Downgrade grpc-go to v1.76.0 and revert compression changes

[jdgeisler]

• I added CHANGELOG entry for this change.
• Change is not relevant to the end user.

Changes

Reverting part of f3d3972 from https://github.com/thanos-io/thanos/releases/tag/v0.41.0-rc.0

Upgrading to grpc-go v1.78.0 with grpc compression was causing OOMKills in our queriers. Below was our querier config with the issue:

Containers:
  query:
    Container ID:  containerd://9cce0755a156abdaa575b3b9d6052eb3e5b5cd6ffdac494d910facad047b2e91
    Image:         quay.io/thanos/thanos:v0.41.0-rc.0
    Image ID:      quay.io/thanos/thanos@sha256:e97ab74506ce7a697a56f82cfce24f94c51de24ee768ec2f750943c873de77fb
    Ports:         10901/TCP, 10902/TCP
    Host Ports:    0/TCP, 0/TCP
    Args:
      query
      --auto-gomemlimit.ratio=0.8
      --enable-auto-gomemlimit
      --query.metadata.default-time-range=24h
      --query.max-concurrent-select=80
      --query.max-concurrent=80
      --store.limits.request-samples=0
      --store.limits.request-series=0
      --query.auto-downsampling
      --grpc-compression=snappy
      --query.replica-label=replica
      --query.replica-label=prometheus_replica
      --store.response-timeout=60s
      --endpoint=dnssrv+_grpc._tcp.receive-headless.thanos.svc.cluster.local:10901
      --endpoint-group-strict=receive-store-short-0.thanos.svc.cluster.local:10901
      --endpoint-group-strict=receive-store-mid-0.thanos.svc.cluster.local:10901
      --endpoint-group-strict=receive-store-long-0.thanos.svc.cluster.local:10901
      --tracing.config=type: OTLP
      config:
        insecure: true
        client_type: "http"
        service_name: receive-query
        endpoint: "opentelemetry-tracing-agent.istio-system.svc.cluster.local:4318"
        url_path: "/v1/traces"

Verification

After reverting these changes the OOMKills were resolved