Add fault injection capabilitites for Redis protocol

[pablochacin]

Cache servers are a fundamental component of modern applications. They are critical in providing low-latency access to information and preventing the overloading of databases.

Providing fault injection capabilities to the connections between clients ad Redis services help the developer validate:

• The impact of increased latencies when accessing the cache in the application performance
• The ability of the application to recover from failures such as connection drops

[nadiamoe]

Other potentially interesting use cases for when Redis especially when it is used as a cache:

• Return not found for a certain, predictable percentage of entries and see how the system responds when it needs to fetch the data from a more expensive data source (like a database) more often than usual
• If possible, fake a different TTL for all entries and see how the system reacts to entries living less time than expected.