tidy-up: .gitignore lines mostly

- `.gitignore`: delete, dedupe and move rules upwards.
  Ref: 6389ba87b8 #13311
- `.gitignore`: fix generated test sources.
  Follow-up to 71cf0d1fca #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 12a6de2f66 #16043
- sort source lists.

Closes #16093

tests/.gitignore

@@ -3,7 +3,6 @@
 # SPDX-License-Identifier: curl
 
 *pid
-*.1.dist
 configurehelp.pm
 curl_client_key
 curl_client_key.pub
@@ -18,12 +17,7 @@ curl_ssh_config
 curl_sshd_config
 ftps_stunnel.conf
 https_stunnel.conf
-log
 log*
-runtests.html
-runtests.pdf
-testcurl.html
-testcurl.pdf
 *.port
 config
 second-hsts.txt