Fix mypy errors attributed to pytorch_lightning/profilers/advanced.py

[nninept]

What does this PR do?

Fixes mypy typing errors in pytorch_lightning/profilers/advanced.py in #13445.

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[codecov]

Codecov Report

Merging #13792 (7706844) into master (238c991) will decrease coverage by 10%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master   #13792     +/-   ##
=========================================
- Coverage      86%      76%    -10%     
=========================================
  Files         327      327             
  Lines       25505    25505             
=========================================
- Hits        21903    19455   -2448     
- Misses       3602     6050   +2448