Merge bitcoin/bitcoin#24982: tests: Port lint-all.sh to lint-all.py

29f44fed36 Converting `lint-all.sh` to `lint-all.py`. (hiago)

Pull request description:

  This PR is converting `test/lint/lint-all.sh` to `test/lint/lint-assertions.py`. It's an item of https://github.com/bitcoin/bitcoin/issues/24783.

ACKs for top commit:
  laanwj:
    Tested ACK 29f44fed36

Tree-SHA512: 5427936aaa8e009613048448cbd79d9225675bdcadcf4fbb70fd091e0aab85e350ef1678da1b388f70d62ca16f40409409f90da3f6bbf057480522cd50fde811

ci/lint/06_script.sh

@@ -22,7 +22,7 @@ test/lint/git-subtree-check.sh src/univalue
 test/lint/git-subtree-check.sh src/leveldb
 test/lint/git-subtree-check.sh src/crc32c
 test/lint/check-doc.py
-test/lint/lint-all.sh
+test/lint/lint-all.py
 
 if [ "$CIRRUS_REPO_FULL_NAME" = "bitcoin/bitcoin" ] && [ "$CIRRUS_PR" = "" ] ; then
     # Sanity check only the last few commits to get notified of missing sigs,