release: Update versions to 0.9.0

[ksubrmnn]

Signed-off-by: Kalya Subramanian [email protected]

• I have cherry-picked any changes labelled needs-cherry-pick-vX.Y.Z

• I have made all of the following version and patch updates:

  1. Updated the container image tag in charts/osm/values.yaml
  2. Updated the chart and app version in charts/osm/Chart.yaml
  3. Updated the default osm-controller image tag in osm cli
  4. Updated the image tags used in the demo manifests
  5. Regenerated the Helm chart README.md

• I have checked that the base branch for this PR is correct as defined by the release guide

Is this a release candidate?
No

[codecov-commenter]

Codecov Report

Merging #3589 (fdffb37) into release-v0.9 (ec07ce8) will increase coverage by 0.05%.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           release-v0.9    #3589      +/-   ##
================================================
+ Coverage         65.77%   65.82%   +0.05%     
================================================
  Files               169      169              
  Lines              7886     7886              
================================================
+ Hits               5187     5191       +4     
+ Misses             2668     2664       -4     
  Partials             31       31              

Flag	Coverage Δ
unittests	65.82% <ø> (+0.05%)	⬆️

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

Impacted Files	Coverage Δ
cmd/cli/mesh_upgrade.go	45.83% <ø> (ø)
pkg/ticker/ticker.go	70.66% <0.00%> (+2.66%)	⬆️
pkg/kubernetes/announcement_handlers.go	77.14% <0.00%> (+5.71%)	⬆️

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