Make rueidis store to be more user-friendly and be more performant

[rueian]

Hi @eko, @rwrz,

Following #187, I made some breaking changes in this PR:

1. Make Get() and GetWithTTL() return go string instead of rueidis.RedisResult to be more user-friendly.
2. Make Set() only accept go string value, since Get() also returns go string.
3. Make GetWithTTL() retrive client-side TTL without additional network roundtrip.

And some improvements:

4. Pipeline SADD and EXPIRE while setting key tags to reduce network roundtrips.
5. Not to cache SMEMBERS while doing Invalidate(), since it will also be invalidated soon.

I also re-run the BenchmarkRueidisSet:

BEFORE:

goos: darwin
goarch: arm64
pkg: github.com/eko/gocache/store/rueidis/v4
BenchmarkRueidisSet
BenchmarkRueidisSet/1
BenchmarkRueidisSet/1-10  	   18704	     61512 ns/op
BenchmarkRueidisSet/2
BenchmarkRueidisSet/2-10  	    9661	    124730 ns/op
BenchmarkRueidisSet/4
BenchmarkRueidisSet/4-10  	    4776	    247294 ns/op
BenchmarkRueidisSet/8
BenchmarkRueidisSet/8-10  	    2469	    491906 ns/op
BenchmarkRueidisSet/16
BenchmarkRueidisSet/16-10 	    1213	    982676 ns/op
BenchmarkRueidisSet/32
BenchmarkRueidisSet/32-10 	     607	   1964616 ns/op
BenchmarkRueidisSet/64
BenchmarkRueidisSet/64-10 	     303	   3930002 ns/op
BenchmarkRueidisSet/128
BenchmarkRueidisSet/128-10         	     152	   7860255 ns/op
BenchmarkRueidisSet/256
BenchmarkRueidisSet/256-10         	      74	  15707281 ns/op
BenchmarkRueidisSet/512
BenchmarkRueidisSet/512-10         	      37	  31525639 ns/op
BenchmarkRueidisSet/1024
BenchmarkRueidisSet/1024-10        	      18	  63099289 ns/op
PASS

AFTER:

goos: darwin
goarch: arm64
pkg: github.com/eko/gocache/store/rueidis/v4
BenchmarkRueidisSet
BenchmarkRueidisSet/1
BenchmarkRueidisSet/1-10  	   27085	     42312 ns/op
BenchmarkRueidisSet/2
BenchmarkRueidisSet/2-10  	   14272	     84054 ns/op
BenchmarkRueidisSet/4
BenchmarkRueidisSet/4-10  	    7027	    167840 ns/op
BenchmarkRueidisSet/8
BenchmarkRueidisSet/8-10  	    3525	    330211 ns/op
BenchmarkRueidisSet/16
BenchmarkRueidisSet/16-10 	    1774	    660522 ns/op
BenchmarkRueidisSet/32
BenchmarkRueidisSet/32-10 	     891	   1321188 ns/op
BenchmarkRueidisSet/64
BenchmarkRueidisSet/64-10 	     445	   2615865 ns/op
BenchmarkRueidisSet/128
BenchmarkRueidisSet/128-10         	     224	   5278540 ns/op
BenchmarkRueidisSet/256
BenchmarkRueidisSet/256-10         	     100	  10586973 ns/op
BenchmarkRueidisSet/512
BenchmarkRueidisSet/512-10         	      54	  21222888 ns/op
BenchmarkRueidisSet/1024
BenchmarkRueidisSet/1024-10        	      27	  42436995 ns/op
PASS

[eko]

Thank you so much @rueian!