tidy-up: `.gitignore` lines mostly
- `.gitignore`: delete, dedupe and move rules upwards.
Ref:
6389ba87b8e5cf74b70c54beab3498dfc773364e #13311
- `.gitignore`: fix generated test sources.
Follow-up to
71cf0d1fca9e1f53524e1545ef0c08d174458d80 #14772
- `.gitignore`: replace exe listings with a wildcard.
- lib: move `setup-*.h` from `EXTRA_DIST` to `CURL_HFILES`.
- `makedebug.bat`: uppercase an argument to match docs.
- GHA/non-native: delete stray env.
Follow-up to
12a6de2f660dd692cce93cb65ce6e3ec126bb531 #16043
- sort source lists.
Closes #16093
projects / thirdparty / curl.git / commit
