cluster: Persistently disable THP

[dveeden]

What problem does this PR solve?

What is changed and how it works?

Check List

Tests

• Manual test (add detailed scripts or steps below)

tiup cluster check topology.yaml --apply

And then check /etc/default/grub:

...
GRUB_CMDLINE_LINUX="crashkernel=1G-4G:192M,4G-64G:256M,64G-:512M resume=/dev/mapper/rl-swap rd.lvm.lv=rl/root rd.lvm.lv=rl/swap transparent_hugepage=never"
...

Related changes

• tiup: Update THP docs docs#20070

Release notes:

TiUP Cluster Check now disables THP persistently

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 52.04%. Comparing base (f57aa1d) to head (bd4a8ce).
Report is 1 commits behind head on master.

❗ Current head bd4a8ce differs from pull request most recent head d774fd7

Please upload reports for the commit d774fd7 to get more accurate results.

Files with missing lines	Patch %	Lines
pkg/cluster/manager/check.go	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2498      +/-   ##
==========================================
- Coverage   52.11%   52.04%   -0.07%     
==========================================
  Files         335      336       +1     
  Lines       36379    36376       -3     
==========================================
- Hits        18957    18929      -28     
- Misses      15109    15138      +29     
+ Partials     2313     2309       -4     

Flag	Coverage Δ
tiup	33.81% <ø> (ø)
unittest	21.63% <0.00%> (?)

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[dveeden]

/retest