test(edalizer): cover parse_args and parameters

[tymonx]

This PR:

• Provides additional unit tests for the fusesoc.edalizer.Edalizer class
• Improves code coverage from 55% to 78% for the fusesoc.edalizer module only
• Tests all variants of passing command line arguments from FuseSoC to Edalize backend
• Tests all variants of handling parameters

To run all tests related with the Edalizer class:

pytest ./tests/test_edalizer.py --cov fusesoc.edalizer

Previous coverage:

Name                  Stmts   Miss  Cover
-----------------------------------------
fusesoc/edalizer.py     387    173    55%
-----------------------------------------
TOTAL                   387    173    55%

Coverage from this PR:

Name                  Stmts   Miss  Cover
-----------------------------------------
fusesoc/edalizer.py     387     85    78%
-----------------------------------------
TOTAL                   387     85    78%

[olofk]

Excellent. Test coverage has been lagging behind. Been merging a lot of PRs lately though, so there's a merge conflict now. Could you rebase against latest main and resolve that first?

[tymonx]

Excellent. Test coverage has been lagging behind. Been merging a lot of PRs lately though, so there's a merge conflict now. Could you rebase against latest main and resolve that first?

@olofk Done 👍