Flip the "manager" relation in citadel and acmecorp

[ronenh]

In order to use the manager relation in ReBAC scenarios, where users up the management chain can operate on their reports or gain access to resources that they have, the direction of the relation should be from the employee (object) to the manager (subject).
This PR flips the direction.

[github-actions]

Pull Request Test Coverage Report for Build 8802125421

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 996 unchanged lines in 26 files lost coverage.
• Overall coverage decreased (-11.4%) to 23.954%

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Files with Coverage Reduction	New Missed Lines	%
pkg/cli/cc/dir.go	2	50.0%
pkg/app/topaz/wire_gen.go	2	51.85%
directory/identity.go	2	60.87%
pkg/testing/logger.go	3	68.57%
pkg/testing/assets.go	3	68.75%
pkg/app/impl/jwt.go	4	14.44%
pkg/app/middlewares/tenant.go	6	72.73%
pkg/cli/cc/cc.go	9	0.0%
builtins/edge/ds/user.go	10	65.63%
builtins/edge/ds/identity.go	10	57.14%

Totals
Change from base Build 8077633159:	-11.4%
Covered Lines:	1145
Relevant Lines:	4780

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💛 - Coveralls