feat(rulesets): add instance key to ruleset

[wsan3]

Description

• Add instance key to ruleset tag
• Enable steps to match and run on certain instances (e.g. dev vs prod)

Example

version: "1"

steps:
  - name: run step on production instance
    ruleset:
      event: push
      branch: main
      instance: https://octocat.prod.github.com
    image: alpine
    commands:
      - echo "this step ran on a production instance"

Related

go-vela/community#803

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (main@563ff52). Learn more about missing BASE report.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1157   +/-   ##
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  Coverage        ?   52.18%           
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  Files           ?      550           
  Lines           ?    18834           
  Branches        ?        0           
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  Hits            ?     9829           
  Misses          ?     8443           
  Partials        ?      562           

Files	Coverage Δ
compiler/native/compile.go	71.73% <100.00%> (ø)