feat(redis): add data source

[Codelax]

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[codecov-commenter]

Codecov Report

Merging #1245 (612efbb) into master (10918ad) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##           master   #1245      +/-   ##
=========================================
- Coverage    1.48%   1.47%   -0.01%     
=========================================
  Files          99     100       +1     
  Lines       15873   15937      +64     
=========================================
  Hits          235     235              
- Misses      15615   15679      +64     
  Partials       23      23              

Impacted Files	Coverage Δ
scaleway/data_source_redis_cluster.go	0.00% <0.00%> (ø)
scaleway/provider.go	17.82% <0.00%> (-0.08%)	⬇️
scaleway/resource_redis_cluster.go	0.00% <0.00%> (ø)
scaleway/resource_vpc_public_gateway_dhcp.go	0.00% <0.00%> (ø)

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