[to #222] Change docs for TiUP

[pingyu]

Signed-off-by: pingyu [email protected]

What problem does this PR solve?

Issue Number: close #222

Problem Description: docs: Change TiUP related docs

What is changed and how does it work?

Change TiUP related docs & configuration templates.
Note that in TiUP, TiKV-CDC is using section kvcdc & kvcdc_servers.
Refer to pingcap/tiup#2022.

Code changes

• No code

Check List for Tests

This PR has been tested by at least one of the following methods:

• No code

Side effects

• No side effects

Related changes

• No related changes

[pingyu]

cc @zeminzhou @haojinming
PTAL, thanks~

[codecov]

Codecov Report

Merging #223 (40c8cc9) into main (b0f96b0) will increase coverage by 0.1434%.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##               main       #223        +/-   ##
================================================
+ Coverage   54.3692%   54.5127%   +0.1434%     
================================================
  Files           236        236                
  Lines         20278      20298        +20     
================================================
+ Hits          11025      11065        +40     
+ Misses         8376       8358        -18     
+ Partials        877        875         -2     

Flag	Coverage Δ
cdc	61.5084% <ø> (+0.2005%)	⬆️

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

Impacted Files	Coverage Δ
cdc/cdc/sink/buffer_sink.go	80.0000% <0.0000%> (-1.8182%)	⬇️
cdc/cdc/sorter/unified/unified_sorter.go	91.6666% <0.0000%> (-0.6945%)	⬇️
cdc/cdc/sink/metrics.go	0.0000% <0.0000%> (ø)
cdc/cdc/sink/tikv.go	81.7796% <0.0000%> (+1.0621%)	⬆️
cdc/cdc/sorter/unified/merger.go	68.9320% <0.0000%> (+1.2944%)	⬆️
cdc/cdc/sorter/unified/heap_sorter.go	85.7142% <0.0000%> (+1.5306%)	⬆️
cdc/cdc/kv/client.go	85.7348% <0.0000%> (+1.5850%)	⬆️
cdc/pkg/util/key.go	71.4285% <0.0000%> (+1.7316%)	⬆️
cdc/cdc/sink/statistics.go	52.8571% <0.0000%> (+2.1108%)	⬆️
cdc/pkg/retry/retry_with_opt.go	95.4545% <0.0000%> (+4.5454%)	⬆️
... and 1 more

[haojinming]

LGTM~

[zeminzhou]

LGTM～