template: support new cdc arguments gc-ttl and tz

[lichunzhu]

What problem does this PR solve?

TiCDC supports gc-ttl and tz arguments now. TiUP should also allow users to use these arguments.
ref: https://docs.pingcap.com/tidb/stable/manage-ticdc#use-binary

What is changed and how it works?

Add gc-ttl and tz arguments in CDCSpec and start_cdc_server script.

Check List

Tests

• Unit test
• Integration test

Code changes

• Has exported variable/fields change

Release notes:

NONE

[CLAassistant]

All committers have signed the CLA.

[lonng]

/merge

[lonng]

/merge

[ti-srebot]

/run-all-tests

[codecov-commenter]

Codecov Report

Merging #770 into master will decrease coverage by 3.88%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #770      +/-   ##
==========================================
- Coverage   54.71%   50.83%   -3.89%     
==========================================
  Files         260      260              
  Lines       21076    21080       +4     
==========================================
- Hits        11531    10715     -816     
- Misses       7991     8903     +912     
+ Partials     1554     1462      -92     

Flag	Coverage Δ
#cluster	41.27% <100.00%> (-5.58%)	⬇️
#dm	26.92% <16.66%> (-0.01%)	⬇️
#integrate	46.07% <100.00%> (-3.92%)	⬇️
#playground	23.07% <ø> (ø)
#tiup	19.80% <ø> (ø)
#unittest	19.49% <16.66%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
pkg/cluster/embed/autogen_pkger.go	100.00% <100.00%> (ø)
pkg/cluster/spec/cdc.go	81.53% <100.00%> (+0.58%)	⬆️
pkg/cluster/template/scripts/cdc.go	78.37% <100.00%> (+1.23%)	⬆️
components/cluster/command/check.go	6.86% <0.00%> (-72.88%)	⬇️
pkg/cluster/task/limits.go	0.00% <0.00%> (-70.00%)	⬇️
pkg/cluster/task/sysctl.go	0.00% <0.00%> (-68.43%)	⬇️
pkg/cluster/operation/check.go	0.00% <0.00%> (-54.53%)	⬇️
pkg/cluster/task/rmdir.go	0.00% <0.00%> (-53.85%)	⬇️
components/cluster/command/audit.go	38.46% <0.00%> (-46.16%)	⬇️
pkg/cluster/operation/operation.go	39.28% <0.00%> (-39.29%)	⬇️
... and 27 more

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