Use forge from db

[anbraten]

This is the first step towards support for multiple forges (#138). It inserts a forge using the currently existing env varaibles into db and uses this forge from db later on in all places of the code.

closes #621

addresses #138

TODO

• add forges table
• add id of forge to repo
• use forge of repo
• add forge from env vars to db if not exists
• migrate repo.ForgeID to the newly generated forge
• support cache with forge from repo
• maybe add forge loading cache? (use LRU cache for forges, I expect users to have less than 10 forges normally)

[woodpecker-bot]

Deployment of preview was torn down

[qwerty287]

code lgtm, but didn't test

[anbraten]

Did some more testing and tweaking. Works quite fine for me now.

[qwerty287]

Still looks good, but didn't test

[anbraten]

Still looks good, but didn't test

Do you want to test it?

[codecov]

Codecov Report

Attention: Patch coverage is 9.70149% with 242 lines in your changes are missing coverage. Please review.

Project coverage is 35.91%. Comparing base (7816288) to head (e255378).
Report is 2 commits behind head on main.

❗ Current head e255378 differs from pull request most recent head 811bc86. Consider uploading reports for the commit 811bc86 to get more accurate results

Files	Patch %	Lines
server/api/repo.go	0.00%	50 Missing ⚠️
server/api/login.go	0.00%	21 Missing ⚠️
server/pipeline/create.go	0.00%	16 Missing ⚠️
server/api/cron.go	0.00%	15 Missing ⚠️
server/api/org.go	0.00%	15 Missing ⚠️
server/api/pipeline.go	0.00%	15 Missing ⚠️
server/pipeline/restart.go	0.00%	10 Missing ⚠️
server/pipeline/approve.go	0.00%	9 Missing ⚠️
...re/datastore/migration/030_set_default_forge_id.go	35.71%	6 Missing and 3 partials ⚠️
server/pipeline/decline.go	0.00%	8 Missing ⚠️
... and 15 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1417      +/-   ##
==========================================
- Coverage   35.98%   35.91%   -0.08%     
==========================================
  Files         231      233       +2     
  Lines       15599    15670      +71     
==========================================
+ Hits         5614     5628      +14     
- Misses       9569     9619      +50     
- Partials      416      423       +7     

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[qwerty287]

Did some basic testing, seems working