cluster: try to disable swap when check --apply

[AstroProfundis]

What problem does this PR solve?

Close #1767

What is changed and how it works?

Support disabling swap (as described in doc) by setting vm.swappiness = 0 and swapoff to ensure all data already in the swap memory are swapped out.

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• nexustar

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[codecov-commenter]

Codecov Report

Merging #1803 (767fe24) into master (70dc546) will increase coverage by 27.54%.
The diff coverage is 100.00%.

❗ Current head 767fe24 differs from pull request most recent head 0be199c. Consider uploading reports for the commit 0be199c to get more accurate results

@@             Coverage Diff             @@
##           master    #1803       +/-   ##
===========================================
+ Coverage   24.31%   51.85%   +27.54%     
===========================================
  Files         277      303       +26     
  Lines       31763    34663     +2900     
===========================================
+ Hits         7723    17974    +10251     
+ Misses      23182    14576     -8606     
- Partials      858     2113     +1255     

Flag	Coverage Δ
cluster	41.19% <100.00%> (?)
dm	18.89% <0.00%> (?)
unittest	21.29% <0.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
pkg/cluster/manager/check.go	68.79% <100.00%> (+64.19%)	⬆️
pkg/cluster/operation/check.go	48.51% <100.00%> (ø)
components/playground/instance/tikv.go	63.24% <0.00%> (ø)
components/playground/instance/pump.go	0.00% <0.00%> (ø)
components/playground/instance/tiflash_config.go	72.22% <0.00%> (ø)
components/playground/instance/process.go	92.31% <0.00%> (ø)
pkg/logger/audit.go	57.69% <0.00%> (ø)
pkg/cluster/operation/action.go	62.53% <0.00%> (ø)
pkg/logger/debug.go	16.67% <0.00%> (ø)
components/playground/instance/tikv_config.go	100.00% <0.00%> (ø)
... and 207 more

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[AstroProfundis]

/merge

[ti-chi-bot]

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

Commit hash: 0be199c