Fix GPBFT Trace log logging by pointer

[masih]

Since ECChain is changed to pointer at struct level log the proposal and vale directly. Otherwise, we get memory address to pointer in logs.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.20%. Comparing base (1e488a2) to head (f251351).
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #867      +/-   ##
==========================================
+ Coverage   67.16%   67.20%   +0.03%     
==========================================
  Files          83       84       +1     
  Lines        9064     9139      +75     
==========================================
+ Hits         6088     6142      +54     
- Misses       2429     2457      +28     
+ Partials      547      540       -7     

Files with missing lines	Coverage Δ
gpbft/gpbft.go	89.97% <100.00%> (ø)

... and 11 files with indirect coverage changes