Stop using Bintray to publish to Maven Central

This commit reworks the CI pipeline to remove the use of Bintray for
publishing to Maven Central. In its place it adds a new
publishToCentral command to the release scripts. This command can be
used to publish a directory tree of artifacts to the Maven Central
gateway hosted by Sonatype.

Publishing consists of 4 steps:

1. Create the staging repository
2. Deploy artifacts to the repository
3. Close the repository
4. Release the repository

The command requires 3 arguments:

1. The type of release being performed
2. Location of a build info JSON file that describes the release
   that is to be deployed
3. Root of a directory structure, in Maven repository layout, that
   contains the artifacts to be deployed

Closes gh-25107

ci/tasks/promote.yml

@@ -10,9 +10,8 @@ params:
   ARTIFACTORY_SERVER:
   ARTIFACTORY_USERNAME:
   ARTIFACTORY_PASSWORD:
-  BINTRAY_SUBJECT:
-  BINTRAY_REPO:
-  BINTRAY_USERNAME:
-  BINTRAY_API_KEY:
+  SONATYPE_USER_TOKEN:
+  SONATYPE_PASSWORD_TOKEN:
+  SONATYPE_STAGING_PROFILE_ID:
 run:
   path: git-repo/ci/scripts/promote.sh

ci/tasks/sync-to-maven-central.yml

@@ -1,16 +0,0 @@
----
-platform: linux
-inputs:
-- name: git-repo
-- name: artifactory-repo
-outputs:
-- name: version
-params:
-  BINTRAY_REPO:
-  BINTRAY_SUBJECT:
-  BINTRAY_USERNAME:
-  BINTRAY_API_KEY:
-  SONATYPE_USER_TOKEN:
-  SONATYPE_PASSWORD_TOKEN:
-run:
-  path: git-repo/ci/scripts/sync-to-maven-central.sh