Add filtering for kNN vector indexer test scenarios

[benwtrent]

This adds random filter search scenarios to our knn vector testing infrastructure.

The seed is by default static, and if the same seed and filter criteria is used over files older than then stored nearest neighbors, the stored nearest neighbors will be used.

Here is an example output:

index_name                      index_type  n_probe  latency(ms)  net_cpu_time(ms)  avg_cpu_count      QPS  recall   visited  filter_selectivity
------------------------------  ----------  -------  -----------  ----------------  -------------  -------  ------  --------  ------------------
cohere-wikipedia-docs-768d.vec         ivf       10         0.94              0.00           0.00  1063.83    0.69   2785.63                1.00
cohere-wikipedia-docs-768d.vec         ivf       20         1.10              0.00           0.00   909.09    0.76   5019.65                1.00
cohere-wikipedia-docs-768d.vec         ivf       30         1.44              0.00           0.00   694.44    0.81   7487.88                1.00
cohere-wikipedia-docs-768d.vec         ivf       40         1.67              0.00           0.00   598.80    0.84  10101.49                1.00
cohere-wikipedia-docs-768d.vec         ivf       50         1.89              0.00           0.00   529.10    0.86  12599.47                1.00
cohere-wikipedia-docs-768d.vec         ivf       60         1.97              0.00           0.00   507.61    0.88  15083.89                1.00
cohere-wikipedia-docs-768d.vec         ivf       70         2.35              0.00           0.00   425.53    0.89  17746.02                1.00
cohere-wikipedia-docs-768d.vec         ivf       80         2.82              0.00           0.00   354.61    0.90  20430.24                1.00
cohere-wikipedia-docs-768d.vec         ivf       90         2.29              0.00           0.00   436.68    0.91  23242.56                1.00
cohere-wikipedia-docs-768d.vec         ivf      100         2.51              0.00           0.00   398.41    0.92  26001.28                1.00
cohere-wikipedia-docs-768d.vec         ivf      200         4.41              0.00           0.00   226.76    0.95  52559.51                1.00
cohere-wikipedia-docs-768d.vec         ivf      200         4.35              0.00           0.00   229.89    0.95  52559.51                1.00
cohere-wikipedia-docs-768d.vec         ivf      200         4.42              0.00           0.00   226.24    0.95  52559.51                1.00
cohere-wikipedia-docs-768d.vec         ivf       10         1.16              0.00           0.00   862.07    0.73   2245.31                0.40
cohere-wikipedia-docs-768d.vec         ivf       20         1.40              0.00           0.00   714.29    0.79   3318.13                0.40
cohere-wikipedia-docs-768d.vec         ivf       30         1.66              0.00           0.00   602.41    0.82   4711.59                0.40
cohere-wikipedia-docs-768d.vec         ivf       40         2.05              0.00           0.00   487.80    0.85   6227.79                0.40
cohere-wikipedia-docs-768d.vec         ivf       50         2.32              0.00           0.00   431.03    0.87   7721.94                0.40
cohere-wikipedia-docs-768d.vec         ivf       60         2.70              0.00           0.00   370.37    0.88   9267.13                0.40
cohere-wikipedia-docs-768d.vec         ivf       70         2.85              0.00           0.00   350.88    0.90  10917.60                0.40
cohere-wikipedia-docs-768d.vec         ivf       80         3.41              0.00           0.00   293.26    0.91  12580.96                0.40
cohere-wikipedia-docs-768d.vec         ivf       90         3.62              0.00           0.00   276.24    0.92  14340.31                0.40
cohere-wikipedia-docs-768d.vec         ivf      100         4.00              0.00           0.00   250.00    0.93  16100.42                0.40
cohere-wikipedia-docs-768d.vec         ivf      200         7.61              0.00           0.00   131.41    0.97  33614.36                0.40
cohere-wikipedia-docs-768d.vec         ivf      200         7.69              0.00           0.00   130.04    0.97  33614.36                0.40
cohere-wikipedia-docs-768d.vec         ivf      200         7.98              0.00           0.00   125.31    0.97  33614.36                0.40

[elasticsearchmachine]

Pinging @elastic/es-search-relevance (Team:Search Relevance)

[iverase]

Looks good to me.

At some point we should add a readme file or a help option that explain all the possible inputs.