Resolve "(CTTC) Forecaster component"

Closes #1

See merge request !160

- Added missing copyright headers

- Cleaned up tests/data/README.md

- Improved tests/data/README.md
- Added log messages to TopologyTools.py

- Added script show_logs_forecaster.sh

- Added Link Attributes to Details page
- Added formatting of Schedule Constraints in Service and Slice Details page

- Added manual test files, descriptors, and README.md
- Minor corrections in test tools

- Corrected data files in unit tests with forecaster

- Added forecaster component

- Removed unneeded and renamed data files
- Removed unneeded old code
- Code cleanup

- Updated port in Forecaster's manifest

- Fixed assertions in pathcomp-forecaster tests

- Fixed unitary tests fixtures
- Fixed assertions in pathcomp-forecaster tests

- Fixed unitary tests fixtures

- Added setting ENABLE_FORECASTER to pathcomp manifest

- Moved topology retrieval to TopologyTools::get_pathcomp_topology_details
- Added forecasting capacity to get_pathcomp_topology_details
- Updated backedn request composition to use link attributes
- Added parameter to explicitly enable/disable forecaster

- Removed TODO.txt file

- Corrected dependencies in Dockerfile
- Corrected Python requirements
- Code cleanup in unitary tests

- Corrected unitary tests in CI/CD pipeline descriptor

- Corrected dependencies in Dockerfile

- Corrected dependencies in Dockerfile

- Added container prune to CI/CD pipeline

- Added container prune to CI/CD pipeline

- Added container prune to CI/CD pipeline

- Added dependendies to test Forecaster

- Extended test MockService_Dependencies with Mock Monitoring servicer
- Extended PrepareTestScenario with Monitoring and Forecaster components
- Added preliminary unitary test for pathcomp-forecaster integration
- Added Forecaster test to GitLab CI/CD pipeline

- Extended tests/Tools to allow setting client endpoints in test descriptors
- Minor code cleanup

- Migrated to Common/Tools/TimeStamp tools
- Minor code cleanup

- Added methods to manage dattime objects
- Updated existing methods accordingly

- Added methods to build constraints: schedule and exclusions
- Ordered build constraint methods according to context.proto file

- Fixed inspection of Link attribute presence

- Fixed unitary tests

- Fixed Dockerfile dependencies

- Fixed Dockerfile dependencies
- Updated TODO.txt file

- Fixed unitary tests

- Fixed CI/CD scripts

- Fixed unitary tests

- Fixed requirements to run unitary tests

- Updated run-tests-locally script for the Forecaster component