fix: Cache language filtering

[Samoed]

Ref #3611

Previously this code

import mteb
from mteb.cache import ResultCache

cache = ResultCache()
cache.download_from_remote()

b = mteb.get_benchmark("ViDoRe(v3)")
vidore3_full_res = cache.load_results(tasks=b.tasks)
print(vidore3_full_res._get_scores())
new_tasks = []
for t in b.tasks:
    new_t = t.filter_languages(["eng"])
    new_tasks.append(new_t)
vidore3_eng_res = cache.load_results(tasks=new_tasks, validate_and_filter=True)
print(vidore3_eng_res._get_scores())

Would output the same, because filtering result wasn't assigned.

[Samoed]

We don't have anything multilingual in mock cache (probably we need to delete most of the results here)

[KennethEnevoldsen]

Shouldn't we just add some?

[Samoed]

We have a lot of no_model_name_available or no_revision_available