Feature: Add spark `cache.count()` and display limit for koalas

[Vincent-Maladiere]

Description

As title says.

Checklist

• [ ] If this PR is a bug fix, the bug is documented in the test suite.
• [ ] Changes were documented in the changelog (pending section).
• [ ] If necessary, changes were made to the documentation (eg new pipeline).

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change

Comparison is base (6ec366e) 91.88% compared to head (9a64218) 91.89%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #39 +/- ## ======================================= Coverage 91.88% 91.89% ======================================= Files 67 67 Lines 2145 2147 +2 ======================================= + Hits 1971 1973 +2 Misses 174 174 ``` | [Impacted Files](https://codecov.io/gh/aphp/eds-scikit/pull/39?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aphp) | Coverage Δ | | |---|---|---| | [eds\_scikit/\_\_init\_\_.py](https://codecov.io/gh/aphp/eds-scikit/pull/39?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aphp#diff-ZWRzX3NjaWtpdC9fX2luaXRfXy5weQ==) | `96.61% <100.00%> (+0.05%)` | :arrow_up: | | [eds\_scikit/utils/custom\_implem/custom\_implem.py](https://codecov.io/gh/aphp/eds-scikit/pull/39?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aphp#diff-ZWRzX3NjaWtpdC91dGlscy9jdXN0b21faW1wbGVtL2N1c3RvbV9pbXBsZW0ucHk=) | `87.50% <100.00%> (ø)` | | | [eds\_scikit/io/hive.py](https://codecov.io/gh/aphp/eds-scikit/pull/39?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aphp#diff-ZWRzX3NjaWtpdC9pby9oaXZlLnB5) | `100.00% <0.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aphp). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aphp)

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