introduce new stats item EvictedBytes (#93)

It's incremented on bucket clean up and reports bytes
evicted from memory. It should help to understand an amount of extra
memory needed for fastcache to serve requests rate on constantly evicted
keys.

Related PR VictoriaMetrics/VictoriaMetrics#9293

file: add LoadFromFileMaxBytes (#89)

file: load from file should allow configure maxBytes (#86)

It is needed to implement same behavior as load from file or new does
(specifically this check
https://github.com/VictoriaMetrics/fastcache/blob/e439f07b570777a09fb9b662e47bd52d895c349b/file.go#L133-L139)

Related to
https://github.com/VictoriaMetrics/VictoriaMetrics/pull/8952/files

file: load should propage file not found error (#84)

So it could be handled by caller. For example here
VictoriaMetrics/VictoriaMetrics#8952

go.mod: update dependencies

go.mod: update dependencies