Add progress bar to both TRAINING and DL2 production scripts

[HealthyPear]

Just a simple progress bar as in current ctapipe-stage1

[codecov]

Codecov Report

Merging #150 (31bd2c3) into master (89e65c4) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #150      +/-   ##
==========================================
+ Coverage   65.66%   65.69%   +0.03%     
==========================================
  Files          23       23              
  Lines        2167     2169       +2     
==========================================
+ Hits         1423     1425       +2     
  Misses        744      744              

Impacted Files	Coverage Δ
protopipe/scripts/data_training.py	92.92% <100.00%> (+0.03%)	⬆️
protopipe/scripts/write_dl2.py	81.72% <100.00%> (+0.06%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 89e65c4...31bd2c3. Read the comment docs.