make relationship parsing to be more efficient through precomputation

[lumjjb]

I ran into long times parsing big SPDX documents that use the hasFiles shortcut fields.

Handling of hasFiles field results in the list of all relationships being iterated through for each package. This change moves the creation of existing_relationships_without_comments to the top level in parse_all_relationships.

Ideally, it would be nice to use a set for more optimal look-up (but that requires Relationship to be hashable, and probably would like a bit more input on how'd you think that would be better implemented).

before:
python3 src/spdx_tools/spdx/clitools/pyspdxtools.py -i   617.18s user 0.53s system 99% cpu 10:17.96 total
after:
python3 spdx_tools/spdx/clitools/pyspdxtools.py -i  2> /dev/null  316.08s user 0.46s system 99% cpu 5:17.73 total

[maxhbr]

some related tests are failing:

 =========================== short test summary info ============================
FAILED tests/spdx/parser/jsonlikedict/test_relationship_parser.py::test_parse_has_files_without_duplicating_relationships[has_files0-existing_relationships0-contains_relationships0] - AssertionError: assert 1 == 0
 +  where 1 = len([Relationship(spdx_element_id='SPDXRef-Package', relationship_type=<RelationshipType.CONTAINS: 6>, related_spdx_element_id='SPDXRef-File1', comment=None)])
 +  and   0 = len([])
============ 1 failed, 1008 passed, 3 skipped, 4 warnings in 41.66s ============

you should be able to run these tests locally with pytest.

[maxhbr]

tests are failing

[maxhbr]

I triggered the CI

[lumjjb]

Thanks! sorry for the multiple pushes, not super familiar with the tooling, just fixed the lint errors (i believe)

[maxhbr]

I am happy to re-trigger and to support you.

(Sadly, I am on my way to bed. Will trigger again tomorrow, if you made new pushes)

[maxhbr]

you can run the linting tests locally via:

$ isort src tests --check
$ black src tests --check
$ flake8 src tests

[lumjjb]

I fixed some of the ones not caused by changes as drive-bys in this PR. Can't reproduce errors with the same tooling locally for some reason :|. So 🤞

[lumjjb]

looks like all green! PTAL Thanks!

[armintaenzertng]

looks good, thanks :)

tests have been fixed

[armintaenzertng]

I noticed that this already fixes #747