[BUG] Chart v1.6.0-rc2 is not synced between longhorn/longhorn and longhorn/charts

[FrankYang0529]

Describe the bug

In longhorn/longhorn v1.6.0-rc2: there is priorityclass.yaml and servicemonitor.yaml.

In longhorn/charts v1.6.x: these two files are not in it.

Expected behavior

Chart files should be synced between two folder.

Environment

• Longhorn version: v1.6.0-rc2

[innobead]

The issue is the newly added files were not included in the automatically merged PR for RC2 at longhorn/charts#139.

That has been fixed in the PR of the tool, which we use in our automatic release at https://github.com/longhorn/release

[innobead]

@chriscchien Please help check whether the built-in priority class and service monitor will be created correctly in https://github.com/longhorn/charts/tree/v1.6.x. Thanks.

cc @longhorn/qa

[chriscchien]

Verified pass on longhorn v1.6.x chart

Using helm fresh install longhorn v1.6.x, upgrade from v1.4.x to v1.6.x and upgrade from v1.5.x to v1.6.x, after install/upgrade complete , can see builtin priority class longhorn-critical and service monitor longhorn-prometheus-servicemonitor created.