ENH: tqdm - use leave=True instead of explicit clean call to avoid spurious new lines

[yarikoptic]

There is still seems to be some spurious new lines, but otherwise output
seems to behave better

Example:

before:

$> datalad install -g -J3 sub001/anatomy
[INFO   ] Getting 1 items of dataset <Dataset path=/tmp/raiders> ...
[INFO   ] Actually getting 10 files

1 installed item is available at
<Dataset path=/tmp/raiders>

after:

$> datalad install -g -J3 sub001/anatomy
[INFO   ] Getting 1 items of dataset <Dataset path=/tmp/raiders> ...
[INFO   ] Actually getting 10 files
1 installed item is available at
<Dataset path=/tmp/raiders>

TODO

• just disable "interactive" progress bars by default while running tests, make them "optional" so we could still smoke test them. This is to avoid destroying output such as names of the tests being printed out... and there is still some spurious newline in some cases which extends output

[codecov-io]

Codecov Report

Merging #1372 into master will decrease coverage by 55.68%.
The diff coverage is 75%.

@@             Coverage Diff             @@
##           master    #1372       +/-   ##
===========================================
- Coverage    89.4%   33.72%   -55.69%     
===========================================
  Files         236      236               
  Lines       24682    24683        +1     
===========================================
- Hits        22068     8325    -13743     
- Misses       2614    16358    +13744

Impacted Files	Coverage Δ
datalad/ui/progressbars.py	82.6% <75%> (-14.46%)	⬇️
datalad/interface/tests/test_docs.py	0% <0%> (-100%)	⬇️
datalad/distribution/tests/test_add_sibling.py	0% <0%> (-100%)	⬇️
datalad/export/tests/__init__.py	0% <0%> (-100%)	⬇️
datalad/crawler/pipelines/__init__.py	0% <0%> (-100%)	⬇️
...ata/parsers/tests/test_frictionless_datapackage.py	0% <0%> (-100%)	⬇️
datalad/customremotes/tests/__init__.py	0% <0%> (-100%)	⬇️
datalad/interface/tests/test_utils.py	0% <0%> (-100%)	⬇️
datalad/metadata/parsers/tests/test_aggregate.py	0% <0%> (-100%)	⬇️
datalad/crawler/base.py	0% <0%> (-100%)	⬇️
... and 180 more

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[mih]

Great. Much appreciated!