Feature/split cluster into small files

[9547]

What problem does this PR solve?

ref #958 (comment)

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

[codecov-io]

Codecov Report

Merging #979 (ae368b4) into master (9e5f2bd) will decrease coverage by 0.15%.
The diff coverage is 68.11%.

@@            Coverage Diff             @@
##           master     #979      +/-   ##
==========================================
- Coverage   55.55%   55.40%   -0.16%     
==========================================
  Files         264      279      +15     
  Lines       19858    19709     -149     
==========================================
- Hits        11032    10919     -113     
+ Misses       7101     7071      -30     
+ Partials     1725     1719       -6     

Flag	Coverage Δ
cluster	43.23% <66.62%> (-0.23%)	⬇️
dm	23.81% <44.66%> (-0.23%)	⬇️
integrate	49.66% <67.57%> (-0.20%)	⬇️
playground	20.29% <0.00%> (ø)
tiup	16.45% <0.00%> (ø)
unittest	23.08% <1.43%> (+0.21%)	⬆️

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

Impacted Files	Coverage Δ
components/dm/command/import.go	19.35% <0.00%> (+0.30%)	⬆️
components/dm/command/patch.go	50.00% <0.00%> (ø)
pkg/repository/mirror.go	39.35% <0.00%> (ø)
pkg/cluster/manager/rename.go	25.00% <25.00%> (ø)
pkg/cluster/manager/edit_config.go	31.25% <31.25%> (ø)
pkg/cluster/manager/cleanup.go	33.33% <33.33%> (ø)
pkg/cluster/manager/scale_out.go	50.76% <50.76%> (ø)
pkg/cluster/manager/patch.go	51.80% <51.80%> (ø)
pkg/cluster/manager/cacert.go	53.19% <53.19%> (ø)
pkg/cluster/manager/scale_in.go	59.52% <59.52%> (ø)
... and 67 more

---

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[lucklove]

/lgtm

[lucklove]

/merge

[ti-chi-bot]

Can merge label has been added.

Git tree hash: ae368b4