UPSTREAM: <carry>: Remove serviceaccount manifest

This is no longer required[0] and may cause issues when newer versions
of the operator-sdk are used.

0: operator-framework/operator-sdk#5326
(cherry picked from commit 6a8abee)
(cherry picked from commit a051449)
(cherry picked from commit 20a57d3)
(cherry picked from commit 4fe5758)
(cherry picked from commit 5c84fd9)
(cherry picked from commit 80f876f)
(cherry picked from commit c49085e)
(cherry picked from commit 169b96b)
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
(cherry picked from commit f1a35ab)
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
(cherry picked from commit 95a89bc)
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
(cherry picked from commit 4e25118)
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
(cherry picked from commit 3e1eb93)
Signed-off-by: Mat Kowalski <mko@redhat.com>