fix(blooms): Ship chunkrefs in task payload

[salvacorts]

What this PR does / why we need it:
This PR adds series w/ chunkrefs to the task definition so builders do not need to download TSDBs to load the series and tasks.

We do this since if we are building blooms for the current day, as the compactor updates and deletes outdated TSDBs, builders may fail to load the referenced (already removed) TSDBs from the object store. This results in a task failure.

Notes:

• Builders check here for chunks that are already in the blocks we reuse
  

  loki/pkg/storage/bloom/v1/builder.go

  Lines 264 to 269 in d8cc1ce

  	if nextInBlocks != nil && nextInBlocks.Series.Fingerprint == nextInStore.Fingerprint {
  	// if the series already exists in the block, we only need to add the new chunks
  	chunksToAdd = nextInStore.Chunks.Unless(nextInBlocks.Series.Chunks)
  	chunksCopied += len(nextInStore.Chunks) - len(chunksToAdd)
  	preExistingBlooms = nextInBlocks.Blooms
  	}

• The task payload may be way bigger now. If we find issues we can reduce the task payload size by issuing more tasks per tenant. But I don't expect this to be an issue at all.

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
• Title matches the required conventional commits format, see here
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[salvacorts]

During a rollout, this may make builders running an older version to fail to deserialize the task. This is fine: task will be retried and eventually the builder will restart.

[salvacorts]

We were downloading and decompressing the TSDB for each gap. that was burning CPU. Fixed with 7d9c558 and bf6bf0c.

[chaudum]

This type is essentially the same as GroupedChunkRefs:

  uint64 fingerprint = 1;
  string tenant = 2;
  repeated ShortRef refs = 3;
}

[cyriltovena]

Might make the planner slower, but let's see.

LGTM