cluster: support configure grafana in server_configs

[nexustar]

What problem does this PR solve?

• support configure grafana in server_configs
• close Support modify grafana smtp host in tiup cluster config #1504

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release notes:

NONE

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• AstroProfundis

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[codecov-commenter]

Codecov Report

Merging #1703 (0fe2408) into master (99bbe1d) will decrease coverage by 0.04%.
The diff coverage is 61.29%.

@@            Coverage Diff             @@
##           master    #1703      +/-   ##
==========================================
- Coverage   53.20%   53.16%   -0.04%     
==========================================
  Files         303      303              
  Lines       34199    34230      +31     
==========================================
+ Hits        18195    18198       +3     
- Misses      13866    13891      +25     
- Partials     2138     2141       +3     

Flag	Coverage Δ
cluster	41.39% <37.93%> (-0.06%)	⬇️
dm	24.74% <35.48%> (+0.01%)	⬆️
playground	12.73% <0.00%> (-0.02%)	⬇️
tiup	14.59% <0.00%> (-0.02%)	⬇️
unittest	21.36% <32.26%> (+0.01%)	⬆️

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

Impacted Files	Coverage Δ
pkg/cluster/spec/grafana.go	63.64% <55.56%> (-1.20%)	⬇️
components/dm/spec/topology_dm.go	84.54% <100.00%> (+0.06%)	⬆️
pkg/cluster/spec/spec.go	84.31% <100.00%> (+0.07%)	⬆️
pkg/utils/retry.go	46.43% <0.00%> (-16.07%)	⬇️
pkg/cluster/spec/tikv.go	61.31% <0.00%> (-1.31%)	⬇️
pkg/cluster/api/pdapi.go	58.94% <0.00%> (-0.53%)	⬇️

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[AstroProfundis]

rest LGTM

[AstroProfundis]

/close

[ti-chi-bot]

@AstroProfundis: Closed this PR.

In response to this:

/close

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[AstroProfundis]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 0fe2408