Use vanilla gntp and move to /ext folder, update certifi and pymediainfo

[medariox]

• PR is based on the DEVELOP branch
• Don't send big changes all at once. Split up big PRs into multiple smaller PRs that are easier to manage and review
• Read the contribution guide

[codecov-io]

Codecov Report

Merging #3682 into develop will not change coverage.
The diff coverage is 66.66%.

@@           Coverage Diff            @@
##           develop    #3682   +/-   ##
========================================
  Coverage    28.93%   28.93%           
========================================
  Files          275      275           
  Lines        34942    34942           
========================================
  Hits         10112    10112           
  Misses       24830    24830

Impacted Files	Coverage Δ
medusa/helpers/__init__.py	21.06% <0%> (ø)	⬆️
medusa/notifiers/growl.py	17.79% <100%> (ø)	⬆️
medusa/session/core.py	66.12% <100%> (ø)	⬆️

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