[#1407] chore(rust): add cpu profile doc

[zuston]

What changes were proposed in this pull request?

add cpu profile doc

Why are the changes needed?

Subtask for #1407

Does this PR introduce any user-facing change?

No.

How was this patch tested?

Needn't

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9471cba) 54.23% compared to head (0240001) 55.20%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1515      +/-   ##
============================================
+ Coverage     54.23%   55.20%   +0.97%     
+ Complexity     2810     2808       -2     
============================================
  Files           430      410      -20     
  Lines         24410    22049    -2361     
  Branches       2082     2082              
============================================
- Hits          13238    12172    -1066     
+ Misses        10340     9118    -1222     
+ Partials        832      759      -73     

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[github-actions]

Test Results

2 287 files  ±0  2 287 suites  ±0   4h 26m 40s ⏱️ - 1m 5s
  819 tests ±0    818 ✅ ±0   1 💤 ±0  0 ❌ ±0 
9 086 runs  ±0  9 073 ✅ ±0  13 💤 ±0  0 ❌ ±0 

Results for commit 0240001. ± Comparison against base commit 866f5ff.

♻️ This comment has been updated with latest results.