simplify conversions from slice to array

[snowcrumble]

Go 1.17 introduced an expression for convertion from slice to array, so codes can be simplified.
Ref: https://tip.golang.org/ref/spec#Conversions_from_slice_to_array_or_array_pointer

Converting a slice to an array yields an array containing the elements of the underlying array of the slice.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: snowcrumble / name: Lijingfeng (aa86493, b910c49)
• ✅ login: dmathieu / name: Damien Mathieu (f43de35)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.5%. Comparing base (38b9734) to head (f43de35).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #5818   +/-   ##
=====================================
  Coverage   84.5%   84.5%           
=====================================
  Files        272     272           
  Lines      22776   22756   -20     
=====================================
- Hits       19256   19248    -8     
+ Misses      3177    3165   -12     
  Partials     343     343           

see 1 file with indirect coverage changes