Log Message:
grafana: Update to 7.4.5

pkgsrc changes:
---------------
  * Add a patch to use the same go binary as the one used to build grafana.
    The build.go program initially ran go which could be linked to any
    installed go binary managed by pkg_alternatives.

upstream changes:
-----------------
7.4.5 (2021-03-18)
Bug fixes

  o Security: Fix API permissions issues related to team-sync CVE-2021-28146,
    CVE-2021-28147. (Enterprise)
  o Security: Usage insights requires signed in users CVE-2021-28148.
    (Enterprise)
  o Security: Do not allow editors to incorrectly bypass permissions on the
    default data source. CVE-2021-27962. (Enterprise)