Defines the API used by notifyBitbucket when
useBuildsApi is not specified.
Legacy uses the commit-scoped build status endpoint:
/rest/build-status/1.0/commits/{commitId}.
Builds API is available in Bitbucket Server and Data Center 7.4 or newer and uses
the repository-scoped builds endpoint:
/rest/api/latest/projects/{projectKey}/repos/{repositorySlug}/commits/{commitId}/builds.
The Builds API requires bitbucketProjectKey and repositorySlug.
It supports additional build information and compatibility with the Required Builds merge check.
A Pipeline can override this default by setting useBuildsApi: true or
useBuildsApi: false.
See the Bitbucket Builds API documentation and the Bitbucket API changelog.