fix(revert): yaml parser switch

[wass3rw3rk]

undoes: #1171 (minus uppercase changes)

also bumps types to rc2

refs:

• fix(yaml): support collapsing of multiple anchor keys in step types#391
• fix(revert): use buildkite as yaml parser types#392

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.05%. Comparing base (609f960) to head (9e15b2e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1195   +/-   ##
=======================================
  Coverage   53.05%   53.05%           
=======================================
  Files         559      559           
  Lines       19747    19747           
=======================================
  Hits        10477    10477           
  Misses       8701     8701           
  Partials      569      569           

Files with missing lines	Coverage Δ
api/types/string.go	85.71% <ø> (ø)
compiler/native/compile.go	71.22% <ø> (ø)
compiler/native/parse.go	87.09% <ø> (ø)
compiler/native/substitute.go	69.23% <ø> (ø)
compiler/template/native/convert.go	90.90% <ø> (ø)
compiler/template/native/render.go	85.71% <ø> (ø)
compiler/template/starlark/render.go	47.16% <ø> (ø)
mock/server/pipeline.go	0.00% <ø> (ø)