[NI-velmurugan]

• This contribution adheres to CONTRIBUTING.md.
• I've updated CHANGELOG.md if applicable.
  - [ ] I've added tests applicable for this pull request

What does this Pull Request accomplish?

This PR adds niscope_external_clocking.py, a Python adaptation of the LabVIEW niScope EX External Clocking.vi

What testing has been done?

Manually tested the example using simulated hardware

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.18%. Comparing base (49c8447) to head (859ed52).
⚠️ Report is 3 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (49c8447) and HEAD (859ed52). Click for more details.

HEAD has 46 uploads less than BASE

Flag	BASE (49c8447)	HEAD (859ed52)
niscopeunittests	10	5
nidcpowerunittests	10	5
nifakeunittests	10	5
nidigitalunittests	10	5
nimodinstunittests	10	5
nirfsaunittests	10	5
nitclkunittests	10	5
codegenunittests	2	1
nidmmsystemtests	1	0
nifgensystemtests	1	0
nimodinstsystemtests	1	0
niscopesystemtests	1	0
nisesystemtests	1	0
niswitchsystemtests	1	0
nirfsgsystemtests	1	0
nidigitalsystemtests	1	0
nidcpowersystemtests	1	0
nitclksystemtests	1	0

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #2237       +/-   ##
===========================================
- Coverage   86.40%   75.18%   -11.22%     
===========================================
  Files          86       42       -44     
  Lines       21563     6633    -14930     
===========================================
- Hits        18631     4987    -13644     
+ Misses       2932     1646     -1286     

Flag	Coverage Δ
codegenunittests	84.78% <ø> (ø)
nidcpowersystemtests	?
nidcpowerunittests	89.53% <ø> (ø)
nidigitalsystemtests	?
nidigitalunittests	68.43% <ø> (ø)
nidmmsystemtests	?
nifakeunittests	86.08% <ø> (ø)
nifgensystemtests	?
nimodinstsystemtests	?
nimodinstunittests	94.20% <ø> (ø)
nirfsaunittests	63.37% <ø> (-0.03%)	⬇️
nirfsgsystemtests	?
niscopesystemtests	?
niscopeunittests	43.20% <ø> (ø)
nisesystemtests	?
niswitchsystemtests	?
nitclksystemtests	?
nitclkunittests	98.26% <ø> (ø)

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