Format attribute database code

[pudelkoM]

Formatting-only change.

[codecov]

Codecov Report

Merging #814 (8cfe713) into main (116c2dc) will not change coverage.
The diff coverage is 45.45%.

@@           Coverage Diff           @@
##             main     #814   +/-   ##
=======================================
  Coverage   78.63%   78.63%           
=======================================
  Files         334      334           
  Lines       30006    30006           
=======================================
  Hits        23595    23595           
  Misses       6411     6411           

Impacted Files	Coverage Δ
stratum/hal/lib/phal/attribute_database.h	100.00% <ø> (ø)
stratum/hal/lib/phal/attribute_group_mock.cc	100.00% <ø> (ø)
stratum/hal/lib/phal/attribute_group_mock.h	26.02% <ø> (ø)
stratum/hal/lib/phal/attribute_database.cc	59.47% <14.28%> (ø)
...tratum/hal/lib/phal/attribute_database_interface.h	100.00% <100.00%> (ø)
stratum/hal/lib/phal/attribute_group.h	100.00% <100.00%> (ø)