tests: Add UDP integration test

Based on !331 (merged)

This MR adds a UDP integration test that performs a simple echo and adjusts the tests/run.sh framework accordingly to support this.

changed milestone to %VPN pre-alpha 09

requested review from @ahf

added 22 commits

• 2d1b9fed...226bae4b - 18 commits from branch tpo/core:main
• a1beb2d3 - tests: Do not consider loopback packets martian
• d798ed7c - tests: Bootstrap chutney properly
• 55253f5b - tests: Add local `coturn` for UDP tunnel testing
• 13e82d08 - tests: Add UDP echo integration test

Compare with previous version

please do not merge this yet, resolving the merge conflict seems to have broken something

fyi - you can always mark a MR as "Draft" (either by clicking the button that does it, or by pre-pending Draft: to the beginning of the title) and then it can't be merged until that is removed.

added 5 commits

• 48b68bc5 - onion-tunnel: Permit loopback as destination
• d596d3b4 - tests: Do not consider loopback packets martian
• d17afe75 - tests: Bootstrap chutney properly
• 87a84c63 - tests: Add local `coturn` for UDP tunnel testing
• 110e3083 - tests: Add UDP echo integration test

Compare with previous version

things work fine now, this is ready for merge :)

added Improve tests label

added 1 commit

• 51bcf30a - doc: Update tests/README.md to reflect UDP support

Compare with previous version

I'll hold back with merging because this one contains !331 (merged) where I have a comment/question, but otherwise this looks good.

Feel free to merge when you are ready.

approved this merge request

merged

mentioned in commit ac33b3f5