Move CI to GitHub Actions

Closes gh-32447

ci/tasks/build-pr.yml

@@ -1,19 +0,0 @@
----
-platform: linux
-inputs:
-- name: git-repo
-caches:
-- path: gradle
-params:
-  BRANCH:
-  CI: true
-  GRADLE_ENTERPRISE_ACCESS_KEY:
-  GRADLE_ENTERPRISE_CACHE_USERNAME:
-  GRADLE_ENTERPRISE_CACHE_PASSWORD:
-  GRADLE_ENTERPRISE_URL: https://ge.spring.io
-run:
-  path: bash
-  args:
-    - -ec
-    - |
-      ${PWD}/git-repo/ci/scripts/build-pr.sh

ci/tasks/build-project.yml

@@ -1,22 +0,0 @@
----
-platform: linux
-inputs:
-- name: git-repo
-outputs:
-- name: distribution-repository
-- name: git-repo
-caches:
-- path: gradle
-params:
-  BRANCH:
-  CI: true
-  GRADLE_ENTERPRISE_ACCESS_KEY:
-  GRADLE_ENTERPRISE_CACHE_USERNAME:
-  GRADLE_ENTERPRISE_CACHE_PASSWORD:
-  GRADLE_ENTERPRISE_URL: https://ge.spring.io
-run:
-  path: bash
-  args:
-    - -ec
-    - |
-      ${PWD}/git-repo/ci/scripts/build-project.sh

ci/tasks/check-project.yml

@@ -1,24 +0,0 @@
----
-platform: linux
-inputs:
-- name: git-repo
-outputs:
-- name: distribution-repository
-- name: git-repo
-caches:
-- path: gradle
-params:
-  BRANCH:
-  CI: true
-  MAIN_TOOLCHAIN:
-  TEST_TOOLCHAIN:
-  GRADLE_ENTERPRISE_ACCESS_KEY:
-  GRADLE_ENTERPRISE_CACHE_USERNAME:
-  GRADLE_ENTERPRISE_CACHE_PASSWORD:
-  GRADLE_ENTERPRISE_URL: https://ge.spring.io
-run:
-  path: bash
-  args:
-    - -ec
-    - |
-      ${PWD}/git-repo/ci/scripts/check-project.sh