Avoid in-place ops during logging result updates

[carmocca]

What does this PR do?

Fixes #11386

This is caused by:

import torch

a = torch.tensor(0.0, dtype=torch.float)
b = torch.tensor(3.0, dtype=torch.double)

a = a + b  # same as `a.add(b)`
# `a` promoted to double
assert a.dtype is torch.double

a = torch.tensor(0.0, dtype=torch.float)  # reset dtype

a += b  # same as `a.add_(b)`
# `a` NOT promoted to double
assert a.dtype is torch.float

Does your PR introduce any breaking changes? If yes, please list them.

None

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cc @Borda @tchaton @rohitgr7 @carmocca @edward-io @ananthsub @kamil-kaczmarek @Raalsky @Blaizzy

[codecov]

Codecov Report

Merging #11401 (65ff90d) into master (948cfd2) will decrease coverage by 4%.
The diff coverage is 100%.

@@           Coverage Diff            @@
##           master   #11401    +/-   ##
========================================
- Coverage      92%      88%    -4%     
========================================
  Files         194      194            
  Lines       16936    16981    +45     
========================================
- Hits        15555    14964   -591     
- Misses       1381     2017   +636     

[tchaton]

LGTM !