EvgBuildID returns the build_id of the current evergreen task, based on the value of an env variable set by the evg project file.

EvgIsPatch returns whether the current evergreen task is a patch, based on the value of an env variable set by the evg project file.

EvgIsTagTriggered returns whether the current evergreen task is part of a tag-triggered version, based on the value of an env variable set by the evg project file.

EvgVariant returns the variant name for the current evergreen task, based on the value of an env variable set by the evg project file.

EvgVersionID returns the current evergreen version, based on the value of an env variable set by the evg project file.

IsFakeTag returns true if the tag set in `EVG_TRIGGERED_BY_TAG` was set via the `fake_tag_for_release_testing` parameter in our Evergreen config.