Feat: Add Redis 8.0 support and GKE Memtier configurations (PR1B)

[manojcns]

this PR extends the Managed Memory Store configuration to allow Redis 8.0 provisioning and adds a dedicated benchmark configuration for GKE-optimized Redis Memtier workloads

• Managed Memory Store: Adds REDIS_8_0 as a supported version constant.
• Benchmarks: Adds the gke_optimized_redis_memtier configuration preset to default_benchmark_config.yaml

Key Changes

• [perfkitbenchmarker/managed_memory_store.py]:

  • Added REDIS_8_0 constant and included it in the REDIS_VERSIONS list.

• [perfkitbenchmarker/configs/default_benchmark_config.yaml]:

  • Added the gke_optimized_redis_memtier configuration block.
  • Sets defaults: Redis 7.2.6, no snapshots, IO threads enabled, and memtier client parameters (12 clients, 32 threads).
  • Enables gke_redis_enable_optimization.

[hubatish]

/gcbrun

[manojcns]

Hello , Let me know ifanything else is needed from my side. I will proceed to create the next PR. If possible, please merge this. Thanks

[manojcns]

Hello, can someone run /gcbrun again. It seems like the PR was in draft mode when it was run before

[hubatish]

simple no drawbacks PR