chore: extract/consolidate contributor pr workflow (#32494)

* add husky script to build circleci yml files

* add circleci cli as a required tool for working with .circleci

* break the original workflows.yml file into separate pieces, using circleci config pack to compose them into the main workflows.yml file

* fix pull request workflow def

* more robust precommit for circleci packing

* even nicer stdout for precommit :)

* allow pr pipeline on this branch

* split up the config.yml to demonstrate more fully

* remove linux-x64-contributor workflow, use contributor workflow to kick off pull-request workflow after approval

* do not run pull-request for contributor prs that have not been approved

* use job level continuation

* try using continuation orb as a job step

* move contributor pr approval to the setup config

* fix parameters

* json?

* json?

* need to check out to be able to pass config path to continuation

* use dynamic config to be able to lint etc contributor prs before approval

* maybe if parameter is direct?

* debug?

* auto-approve contributor gate when launched as an internal pr

* vastly simplify, use job filter

* fix

* fix conditional on pr pipeline

* rm contributor pr flag on build job, use local env var instead

* does not use context for contrib prs

Author: cacieprins

.circleci/src/pipeline/@pipeline.yml

@@ -1497,9 +1497,6 @@ jobs:
       resource_class:
         type: string
         default: large
-      is_contributor_pr:
-        type: boolean
-        default: false
     resource_class: << parameters.resource_class >>
     steps:
       - restore_cached_workspace
@@ -1518,8 +1515,9 @@ jobs:
           command: yarn list --depth=0 || true
       - run:
           name: Check env canaries
-          command: node ./scripts/circle-env.js --check-canaries --is-contributor-pr <<
-            parameters.is_contributor_pr >>
+          command: |
+            IS_CONTRIBUTOR_PR=$([[ "<< pipeline.git.branch >>" =~ ^pull/[0-9]+$ ]] && echo "true" || echo "false")
+            node ./scripts/circle-env.js --check-canaries --is-contributor-pr $IS_CONTRIBUTOR_PR
       - build-and-persist
 
   lint: