Add `rng` parameter to appropriate methods

[wildart]

This PR adds a kw-argument rng to the methods that rely on RNG. This will break dependency on the default global RNG object and will allow to better control of RNG behavior in the tests by using RNG from StableRNGs package.

In addition, some test were switched from using Random.GLOBAL_RNG to StableRNG.

[codecov-commenter]

Codecov Report

Merging #228 (159061b) into master (8af2507) will decrease coverage by 0.12%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #228      +/-   ##
==========================================
- Coverage   95.30%   95.18%   -0.13%     
==========================================
  Files          17       16       -1     
  Lines        1213     1328     +115     
==========================================
+ Hits         1156     1264     +108     
- Misses         57       64       +7     

Impacted Files	Coverage Δ
src/fuzzycmeans.jl	87.87% <100.00%> (+1.21%)	:arrow_up:
src/kmeans.jl	99.35% <100.00%> (+0.06%)	:arrow_up:
src/seeding.jl	100.00% <100.00%> (ø)
src/hclust.jl	93.95% <0.00%> (-0.91%)	:arrow_down:
src/mcl.jl	90.38% <0.00%> (-0.15%)	:arrow_down:
src/utils.jl	100.00% <0.00%> (ø)
src/dbscan.jl	100.00% <0.00%> (ø)
src/varinfo.jl	100.00% <0.00%> (ø)
src/Clustering.jl
... and 5 more

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[adrhill]

Awesome, this looks great for tests in downstream packages. I would love to see a release tagged for this!

[ararslan]

https://github.com/JuliaRegistries/General/pull/68842