Update Cloud Native Deployment section of README

[albertteoh]

Which problem is this PR solving?

• Resolves [Bug]: Deprecated documentation #4074

Short description of the changes

• Copies (with minor rewordings) the deprecation notice in the jaeger-kubernetes repo into the Cloud Native Deployment section of the Jaeger README.

[codecov]

Codecov Report

Base: 97.15% // Head: 97.16% // Increases project coverage by +0.01% 🎉

Coverage data is based on head (c9a07b3) compared to base (a6587d0).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4076      +/-   ##
==========================================
+ Coverage   97.15%   97.16%   +0.01%     
==========================================
  Files         295      295              
  Lines       17413    17413              
==========================================
+ Hits        16918    16920       +2     
+ Misses        398      397       -1     
+ Partials       97       96       -1     

Flag	Coverage Δ
unittests	97.16% <ø> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
plugin/storage/integration/integration.go	75.95% <0.00%> (-0.39%)	⬇️
cmd/query/app/static_handler.go	98.19% <0.00%> (+1.80%)	⬆️

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