Since 0188af39 we've cached loaded reports, however there was an
edge case in those report sources that relied on the current user
as part of their own initialization (e.g. checking capabilities).
Co-authored-by: Marina Glancy <marina@moodle.com>
Statically cache list of loaded reports during request lifecycle,
this ensures that computationally heavy initialisation routines
in system reports are only executed once (e.g. the access tab).
Implement elements for creating/editing reports, along with
new system report for listing and accompanying JS modules for
user interaction.
Create "Users" datasource as proof-of-concept.
Co-authored-By: Paul Holden <paulh@moodle.com>
