docs: update helm documentation

[anthonycorletti]

SUMMARY

Noticed #11363 and updated documentation to reflect a success full deployment on GKE with helm3.

$ helm version && echo && kubectl version && echo && kubectl get po -A
version.BuildInfo{Version:"v3.5.1", GitCommit:"32c22239423b3b4ba6706d450bd044baffdcf9e6", GitTreeState:"dirty", GoVersion:"go1.15.7"}

Client Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.3", GitCommit:"1e11e4a2108024935ecfcb2912226cedeafd99df", GitTreeState:"clean", BuildDate:"2020-10-14T12:50:19Z", GoVersion:"go1.15.2", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"17+", GitVersion:"v1.17.14-gke.1600", GitCommit:"7c407f5cc8632f9af5a2657f220963aa7f1c46e7", GitTreeState:"clean", BuildDate:"2020-12-07T09:22:27Z", GoVersion:"go1.13.15b4", Compiler:"gc", Platform:"linux/amd64"}

NAMESPACE     NAME                                                        READY   STATUS      RESTARTS   AGE
default       superset-77f5b77848-cchs2                                   1/1     Running     0          32m
default       superset-init-db-8q6xw                                      0/1     Completed   0          32m
default       superset-postgresql-0                                       1/1     Running     0          32m
default       superset-redis-master-0                                     1/1     Running     0          32m
default       superset-worker-86945968b4-56zdf                            1/1     Running     0          32m
kube-system   event-exporter-gke-666b7ffbf7-sv5wg                         2/2     Running     0          93m
kube-system   fluentbit-gke-42qh8                                         2/2     Running     0          93m
kube-system   fluentbit-gke-gq544                                         2/2     Running     0          93m
kube-system   fluentbit-gke-zjtd7                                         2/2     Running     0          93m
kube-system   gke-metrics-agent-2qs5z                                     1/1     Running     0          93m
kube-system   gke-metrics-agent-6n7bm                                     1/1     Running     0          93m
kube-system   gke-metrics-agent-fjfvk                                     1/1     Running     0          93m
kube-system   kube-dns-9c59558bb-wvmkf                                    4/4     Running     0          93m
kube-system   kube-dns-9c59558bb-xrqnk                                    4/4     Running     0          93m
kube-system   kube-dns-autoscaler-5c78d65cd9-q4ng2                        1/1     Running     0          93m
kube-system   kube-proxy-gke-superset-test-default-pool-900766ff-1cwt     1/1     Running     0          93m
kube-system   kube-proxy-gke-superset-test-default-pool-900766ff-k1nt     1/1     Running     0          93m
kube-system   kube-proxy-gke-superset-test-default-pool-900766ff-vvj4     1/1     Running     0          93m
kube-system   l7-default-backend-5b76b455d-db4kl                          1/1     Running     0          93m
kube-system   metrics-server-v0.3.6-547dc87f5f-44kbj                      2/2     Running     0          92m
kube-system   prometheus-to-sd-7rrkt                                      1/1     Running     0          93m
kube-system   prometheus-to-sd-fxvxk                                      1/1     Running     0          93m
kube-system   prometheus-to-sd-thc28                                      1/1     Running     0          93m
kube-system   stackdriver-metadata-agent-cluster-level-56d688675d-lsdqr   2/2     Running     0          92m

ADDITIONAL INFORMATION

Can publish these on merge wrt https://github.com/apache/superset/blob/master/docs/README.md#to-publish

[codecov-io]

Codecov Report

Merging #12932 (89f7398) into master (daefebb) will decrease coverage by 8.44%.
The diff coverage is n/a.

❗ Current head 89f7398 differs from pull request most recent head 74f4c93. Consider uploading reports for the commit 74f4c93 to get more accurate results

@@            Coverage Diff             @@
##           master   #12932      +/-   ##
==========================================
- Coverage   77.39%   68.94%   -8.45%     
==========================================
  Files         928     1025      +97     
  Lines       47024    48765    +1741     
  Branches     5812     5241     -571     
==========================================
- Hits        36393    33623    -2770     
- Misses      10488    15008    +4520     
+ Partials      143      134       -9     

Flag	Coverage Δ
cypress	50.83% <ø> (-5.61%)	⬇️
hive	?
javascript	61.83% <ø> (-1.31%)	⬇️
mysql	?
postgres	?
presto	?
python	67.29% <ø> (-13.83%)	⬇️
sqlite	?

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

Impacted Files	Coverage Δ
...frontend/src/components/ErrorMessage/IssueCode.tsx	0.00% <0.00%> (-100.00%)	⬇️
...rc/components/ErrorMessage/TimeoutErrorMessage.tsx	0.00% <0.00%> (-100.00%)	⬇️
...c/components/ErrorMessage/DatabaseErrorMessage.tsx	0.00% <0.00%> (-94.74%)	⬇️
.../components/ErrorMessage/ParameterErrorMessage.tsx	6.25% <0.00%> (-90.63%)	⬇️
...ponents/Select/WindowedSelect/WindowedMenuList.tsx	10.71% <0.00%> (-85.72%)	⬇️
superset-frontend/src/utils/copy.ts	11.53% <0.00%> (-84.62%)	⬇️
...nd/src/filters/components/Select/transformProps.ts	0.00% <0.00%> (-81.82%)	⬇️
...ontend/src/filters/components/Select/buildQuery.ts	0.00% <0.00%> (-77.78%)	⬇️
...rontend/src/components/ErrorMessage/ErrorAlert.tsx	20.40% <0.00%> (-73.47%)	⬇️
...nd/src/components/ErrorMessage/BasicErrorAlert.tsx	35.29% <0.00%> (-64.71%)	⬇️
... and 739 more

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[anthonycorletti]

noting that requirements.yaml is deprecated in helm 3 https://helm.sh/docs/faq/#consolidation-of-requirementsyaml-into-chartyaml

[amitmiran137]

Look like a re doing of #11763

[craig-rueda]

Left inline comment. Please also remove requiments.yaml / requirements.locl in favor of keeping everything in Chart.yaml.