feat: Expose workflow.paramteres with JSON string of all params

[simster7]

Closes: #2242

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@d8a9ea0). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master    #2341   +/-   ##
=========================================
  Coverage          ?   13.31%           
=========================================
  Files             ?       72           
  Lines             ?    24606           
  Branches          ?        0           
=========================================
  Hits              ?     3276           
  Misses            ?    20917           
  Partials          ?      413

Impacted Files	Coverage Δ
workflow/controller/operator.go	61.91% <100%> (ø)
workflow/validate/validate.go	74.65% <100%> (ø)

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[whynowy]

LGTM