Restructure release

[sroet]

Following the debugging done in #241, I decided to restructure the release following current best practices.

The workflow now has 4 jobs each depending on the previous one to succeed, with the type of runner in []:

1. [self-hosted] build the package and test with twine check, upload artifact
2. [github] upload the distribution to testPyPI
3. [self-hosted] pull the latest version from testPyPI and run the test suite
4. [github] upload the distribution to PyPI

[github-actions]

File	Coverage		Missing
All files	89%	✅
src/pytom_tm/correlation.py	85%	❌	97-98 130
src/pytom_tm/entry_points.py	80%	❌	30 115-132 237-282 387-406 559-579 1092-1103
src/pytom_tm/extract.py	97%	✅	264-269
src/pytom_tm/io.py	84%	❌	20 40 56 72 85 104-110 127-131 138 144 181 186 233-235 305 451-459 484
src/pytom_tm/mask.py	80%	❌	75 93 103-104
src/pytom_tm/parallel.py	89%	✅	14-15 93 104-105 111 176
src/pytom_tm/plotting.py	16%	❌	19-21 24-31 35-43 47-50 53-69 72-73 76-77 97-102 118-126 132-149 164-172 176-193 197-205 209-216 222 228 233 247-397
src/pytom_tm/tmjob.py	98%	✅	371-372 388 482 610 659
src/pytom_tm/utils.py	78%	❌	18-20
src/pytom_tm/weights.py	96%	✅	58 313-317 324 534 539 544

Minimum allowed coverage is 88%

Generated by 🐒 cobertura-action against fa53447

[McHaillet]

Looks really good! I can't spot anything wrong with it :)