[do not merge] Change rag images strategies default

[lferran]

Description

Do not merge until 11th of November.

How was this PR tested?

Describe how you tested this PR.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 86.19%. Comparing base (8ee8c64) to head (ac3a9d4). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
nucliadb_models/src/nucliadb_models/search.py	0.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2572      +/-   ##
==========================================
+ Coverage   86.17%   86.19%   +0.02%     
==========================================
  Files         377      377              
  Lines       23791    24052     +261     
==========================================
+ Hits        20501    20732     +231     
- Misses       3290     3320      +30     

Flag	Coverage Δ
nucliadb	73.67% <ø> (+<0.01%)	:arrow_up:
nucliadb-ingest	28.51% <ø> (ø)
nucliadb-reader	24.54% <ø> (ø)
nucliadb-search	37.61% <ø> (-0.02%)	:arrow_down:
nucliadb-standalone	46.61% <ø> (ø)
nucliadb-train	44.74% <ø> (ø)
nucliadb-writer	39.13% <ø> (ø)
nucliadb_dataset	55.45% <ø> (ø)
nucliadb_models	85.09% <ø> (ø)
nucliadb_sdk	80.11% <ø> (ø)
nucliadb_sidecar	89.03% <ø> (ø)
nucliadb_telemetry	86.55% <ø> (ø)
nucliadb_utils	84.36% <ø> (ø)

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[carlesonielfa]

I think we will need to revert the changes I did here as well! https://github.com/nuclia/nucliadb/pull/2175

Before the strategy was not set as default but the docs said the default behavior was to send images so that PR added the default functionality. Now I see that afterwards the default parameter was changed