Transform the LRU cache to use ETS with pointer to head/tail

[samuelmanzanera]

This remove the need to have a list of all values
and have to implement costly move key to front or eviction.

The implementation will leverage mainly key value & atomic counter operations.

Fixes #1089

Type of change

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• Enhancements

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
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• I have added tests that prove my fix is effective or that my feature works
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[Neylix]

We have to take care about the number of LRU we will start.
As the now a LRU starts ets table, we cannot start as many LRU as we want since the number of ets table is limited

[samuelmanzanera]

We have to take care about the number of LRU we will start.
As the now a LRU starts ets table, we cannot start as many LRU as we want since the number of ets table is limited

According to the doc this is not anymore the case. But even with 1400 tables this would give a lot LRUs to create.