fix(server): Only hydrate nodes if they are needed. Fixes #6000

[alexec]

No description provided.

[codecov]

Codecov Report

Merging #6004 (970f272) into master (bad6155) will increase coverage by 0.03%.
The diff coverage is 49.31%.

❗ Current head 970f272 differs from pull request most recent head 5ee5103. Consider uploading reports for the commit 5ee5103 to get more accurate results

@@            Coverage Diff             @@
##           master    #6004      +/-   ##
==========================================
+ Coverage   47.33%   47.36%   +0.03%     
==========================================
  Files         248      248              
  Lines       15663    15688      +25     
==========================================
+ Hits         7414     7431      +17     
- Misses       7316     7321       +5     
- Partials      933      936       +3     

Impacted Files	Coverage Δ
cmd/argo/commands/server.go	31.70% <0.00%> (-2.21%)	⬇️
server/workflow/workflow_server.go	44.28% <24.13%> (+1.55%)	⬆️
util/fields/fields.go	79.59% <80.55%> (-7.51%)	⬇️
cmd/argoexec/commands/emissary.go	48.43% <0.00%> (-1.57%)	⬇️
cmd/argo/commands/get.go	56.45% <0.00%> (-0.65%)	⬇️
workflow/controller/operator.go	70.60% <0.00%> (+0.21%)	⬆️

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