Added tmva model to file loader

[simonge]

Briefly, what does this PR introduce?

Introduces the tmva low-q2 model file to the geometry calibrations so it gets downloaded when the geometry is loaded by eicrecon

What kind of change does this PR introduce?

• [ ] Bug fix (issue #__)
• [x] New feature (issue #__)
• [ ] Documentation update
• [ ] Other: __

Please check if this PR fulfills the following:

• [ ] Tests for the changes have been added
• [ ] Documentation has been added / updated
• [ ] Changes have been communicated to collaborators

Does this PR introduce breaking changes? What changes might users need to make to their code?

No

Does this PR change default behavior?

No