Add retries to SCPMover.copy()

[pnuu]

This PR adds retries to the SCPMover.copy() method. Currently there's only retries in creating the connection.

VERY early work.

• Closes #xxxx
• Tests added
• Fully documented
• Add your name to AUTHORS.md if not there already

[TAlonglong]

Yeah I good with thisl.

Is it your intention to drop the timeout to the put function by doing this?

[TAlonglong]

Do you need the break here if you break on success further down?

[pnuu]

I was already pretty tired when writing that, so probably not 😅

[pnuu]

Is it your intention to drop the timeout to the put function by doing this?

I think we can keep the timeout option, too.

[codecov]

Codecov Report

❌ Patch coverage is 98.85057% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 88.55%. Comparing base (5149f50) to head (ea70de1).
⚠️ Report is 366 commits behind head on main.

Files with missing lines	Patch %	Lines
trollmoves/movers.py	98.11%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #153      +/-   ##
==========================================
+ Coverage   88.37%   88.55%   +0.18%     
==========================================
  Files          22       22              
  Lines        4437     4492      +55     
==========================================
+ Hits         3921     3978      +57     
+ Misses        516      514       -2     

Flag	Coverage Δ
unittests	88.55% <98.85%> (+0.18%)	⬆️

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