Enriched build scans

[jprinet]

Enrich Jenkins job summary page with the following build scan data fetched from Gradle Enterprise API:

• project name
• requested tasks
• build tool version
• build outcome
• build scan links

The feature is turned off by default and can be enabled and configured through the Jenkins system administration.

Worth noticing that the InjectionConfig has been moved to GlobalConfig

[c00ler]

Very nice feature! The only thing that I find the configuration is a little bit confusing.

• Do we need the ability to override the API base URL? AFAIK GE API is always a part of the GE, so the base URL is the same. We should be able to take it from the existing configuration parameter. Are there any customers that require an override of the URL?
• Do we need a separate token to query the API? Shouldn't the already existing token, that we use to publish be enough to also query the details?