feat(ruleset): add dynamic evaluation with expr

[JordanSussman]

xref: go-vela/community#1026

[codecov]

Codecov Report

Attention: Patch coverage is 46.15385% with 14 lines in your changes missing coverage. Please review.

Project coverage is 56.59%. Comparing base (794c666) to head (cb24e66).

Files with missing lines	Patch %	Lines
compiler/types/pipeline/ruleset.go	6.66%	13 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1233      +/-   ##
==========================================
- Coverage   56.61%   56.59%   -0.03%     
==========================================
  Files         626      626              
  Lines       35495    35509      +14     
==========================================
  Hits        20096    20096              
- Misses      14720    14733      +13     
- Partials      679      680       +1     

Files with missing lines	Coverage Δ
compiler/native/compile.go	69.21% <100.00%> (ø)
compiler/types/pipeline/build.go	72.72% <100.00%> (ø)
compiler/types/pipeline/container.go	82.91% <100.00%> (ø)
compiler/types/pipeline/secret.go	94.59% <100.00%> (ø)
compiler/types/pipeline/stage.go	96.34% <100.00%> (ø)
compiler/types/pipeline/ruleset.go	71.68% <6.66%> (-6.61%)	⬇️