fix(rdb): add nodetype autocompletion

[Monitob]

Community Note

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Relates OR Closes #0000

Release note for CHANGELOG:

[codecov-commenter]

Codecov Report

Merging #2731 (bfaf6e4) into master (ead7b75) will decrease coverage by 0.05%.
The diff coverage is 10.52%.

@@            Coverage Diff             @@
##           master    #2731      +/-   ##
==========================================
- Coverage   75.19%   75.14%   -0.05%     
==========================================
  Files         134      134              
  Lines       25892    25909      +17     
==========================================
  Hits        19469    19469              
- Misses       5756     5773      +17     
  Partials      667      667              

Impacted Files	Coverage Δ
internal/namespaces/rdb/v1/custom.go	100.00% <ø> (ø)
internal/namespaces/rdb/v1/custom_instance.go	80.87% <10.52%> (-3.48%)	⬇️

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