[ENHANCEMENT] Store count for submitted responses in search engine

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 70.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 91.98%. Comparing base (0fbe34d) to head (d0fcdb6).

Files	Patch %	Lines
...server/src/argilla_server/search_engine/commons.py	33.33%	2 Missing :warning:
...la-server/src/argilla_server/search_engine/base.py	66.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## feat/add-count-submitted-responses-as-property #5119 +/- ## ================================================================================== - Coverage 92.02% 91.98% -0.04% ================================================================================== Files 136 136 Lines 5867 5877 +10 ================================================================================== + Hits 5399 5406 +7 - Misses 468 471 +3 ``` | [Flag](https://app.codecov.io/gh/argilla-io/argilla/pull/5119/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=argilla-io) | Coverage Δ | | |---|---|---| | [argilla-server](https://app.codecov.io/gh/argilla-io/argilla/pull/5119/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=argilla-io) | `91.98% <70.00%> (-0.04%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=argilla-io#carryforward-flags-in-the-pull-request-comment) to find out more.

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