Fix rancher traefik upgrade suggestion

[brandond]

Proposed Changes

Add dashboard annotation to the Traefik helm chart to prevent Rancher from suggesting upgrades to it.

The 'hidden' annotation only works on charts in the repo, not ones installed to the cluster. This makes it show as 'Managed' in the UI.

Types of Changes

bugfix

Verification

Import K3s cluster into Rancher or install Rancher on K3s. Note that it no longer suggests upgrading the packaged Traefik.

Linked Issues

• Rancher suggests users upgrade the k3s-packaged Traefik chart, breaking ingress rancher/dashboard#4442

User-Facing Change

Rancher will no longer suggest upgrading the Traefik chart packaged with K3s.

Further Comments

[codecov-commenter]

Codecov Report

Merging #4324 (d1d50dd) into master (ab3d25a) will decrease coverage by 0.34%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4324      +/-   ##
==========================================
- Coverage   11.52%   11.18%   -0.35%     
==========================================
  Files         135      135              
  Lines        9289     9289              
==========================================
- Hits         1071     1039      -32     
- Misses       7990     8032      +42     
+ Partials      228      218      -10     

Flag	Coverage Δ
inttests	?
unittests	11.18% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/static/zz_generated_bindata.go	0.00% <ø> (ø)
tests/util/cmd.go	0.00% <0.00%> (-42.03%)	⬇️
pkg/flock/flock_unix.go	0.00% <0.00%> (-20.00%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ab3d25a...d1d50dd. Read the comment docs.

[dereknola]

The integration test failure is unrelated, feel free to ignore.