Correct Dependencies path

[marcosbento]

Description

The following changes allow adding ecflow as a submodule/subproject of an umbrela CMake project:

• Correct Dependencies path
• Correct location of ecFlow executables, used for testing

Contributor Declaration

By opening this pull request, I affirm the following:

• All authors agree to the Contributor License Agreement.
• The code follows the project's coding standards.
• I have performed self-review and added comments where needed.
• I have added or updated tests to verify that my changes are effective and functional.
• I have run all existing tests and confirmed they pass.

🌦️ >> Documentation << 🌦️
https://sites.ecmwf.int/docs/dev-section/ecflow/pull-requests/PR-286

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.38%. Comparing base (5ffb39a) to head (86865eb).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #286      +/-   ##
===========================================
+ Coverage    49.34%   49.38%   +0.04%     
===========================================
  Files         1234     1234              
  Lines        97921    97916       -5     
  Branches     14880    14881       +1     
===========================================
+ Hits         48316    48356      +40     
+ Misses       49605    49560      -45     

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