Update source file format

[july2993]

Update source file format

dm has updated the file format form toml to yml

release note:

Support yml source format with tiup-dm

[lucklove]

LGTM

[codecov-commenter]

Codecov Report

Merging #655 into master will increase coverage by 0.66%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #655      +/-   ##
==========================================
+ Coverage   56.71%   57.37%   +0.66%     
==========================================
  Files         242      243       +1     
  Lines       17469    17510      +41     
==========================================
+ Hits         9908    10047     +139     
+ Misses       6265     6164     -101     
- Partials     1296     1299       +3     

Flag	Coverage Δ
#coverage	57.37% <ø> (+0.66%)	⬆️

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

Impacted Files	Coverage Δ
...c/github.com/pingcap/tiup/pkg/cluster/spec/spec.go	90.94% <0.00%> (-2.62%)	⬇️
...m/pingcap/tiup/components/cluster/command/check.go	81.63% <0.00%> (-0.50%)	⬇️
...src/github.com/pingcap/tiup/pkg/cluster/manager.go	70.37% <0.00%> (-0.20%)	⬇️
....com/pingcap/tiup/pkg/cluster/spec/spec_manager.go	67.50% <0.00%> (-0.15%)	⬇️
...c/github.com/pingcap/tiup/pkg/cluster/api/dmapi.go	61.31% <0.00%> (ø)
....com/pingcap/tiup/pkg/cluster/operation/destroy.go	54.48% <0.00%> (ø)
...com/pingcap/tiup/pkg/cluster/spec/server_config.go	65.87% <0.00%> (ø)
....com/pingcap/tiup/pkg/cluster/clusterutil/retry.go
...ub.com/pingcap/tiup/pkg/cliutil/prepare/prepare.go
go/src/github.com/pingcap/tiup/pkg/utils/utils.go	100.00% <0.00%> (ø)
... and 6 more

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