* Fix race in helm list when partitioning

Problem:
The chunks slice that is passed through the channel is reused for each
partition. This means that encoding the release into a message is racing with
populating the next partition, causing the results to sometimes not fit in the
message, and the release list to be incorrect

Solution:
Allocate a new slice for each partition

Issue #3322
Signed-off-by: Brian Marshall <bmarshall13@users.noreply.github.com>
(cherry picked from commit a0858e29d877b8aa19478133865e45958ff21a9e)

* fix import sorting
Signed-off-by: Matthew Fisher <matt.fisher@microsoft.com>

* ref(release_server_test): use NewReleaseServer()
Signed-off-by: Matthew Fisher <matt.fisher@microsoft.com>

* add unit test for race condition in `helm list`
Signed-off-by: Matthew Fisher <matt.fisher@microsoft.com>