update rawtrafficcontroller kind switch to support mqttproxy

[suchen-sci]

fix #693

[codecov-commenter]

Codecov Report

Merging #694 (251996a) into main (d3732f5) will decrease coverage by 0.03%.
The diff coverage is 71.42%.

@@            Coverage Diff             @@
##             main     #694      +/-   ##
==========================================
- Coverage   80.06%   80.02%   -0.04%     
==========================================
  Files          93       93              
  Lines       10100    10100              
==========================================
- Hits         8087     8083       -4     
- Misses       1538     1542       +4     
  Partials      475      475              

Impacted Files	Coverage Δ
pkg/filters/proxy/pool.go	61.98% <71.42%> (ø)
pkg/filters/headerlookup/headerlookup.go	84.61% <0.00%> (-1.40%)	⬇️
pkg/object/mqttproxy/client.go	79.72% <0.00%> (-0.91%)	⬇️

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[suchen-sci]

updated!