Merge bitcoin/bitcoin#34614: ci: Put space and non-ASCII char in scratch dir

7777a92a92 ci: Use path with spaces on windows as well (MarcoFalke)
fac6c4270d ci: Put space and non-ASCII char in scratch dir (MarcoFalke)
fa38759823 ci: Require $FILE_ENV (MarcoFalke)

Pull request description:

  It seems unlikely that many users have a space in their paths, but it seems a use-case worth enough to be tested by CI, so that it does not have to be done manually. Ref https://github.com/bitcoin/bitcoin/pull/33929#discussion_r2590523065 / https://mirror.b10c.me/bitcoin-bitcoin/33929/#discussion_r2590523065

  So do that here, and also add a non-ASCII char while touching.

  Also, fix all tests that are broken and assume no space exists in paths.

ACKs for top commit:
  hebasto:
    ACK 7777a92a92.
  sedited:
    ACK 7777a92a92

Tree-SHA512: eceb1f6c932c6966cdca8ca8df750081ec5134db5e5f558f7d955716409117bec7c8585d75865e2c98bc1ae7394f3ce64dff87bcebe1e68591afaeef1831d6dd

.github/ci-windows-cross.py

@@ -96,7 +96,7 @@ def run_functional_tests():
         "--jobs",
         num_procs,
         "--quiet",
-        f"--tmpdirprefix={workspace}",
+        f"--tmpdirprefix={workspace / '_ _'}",
         "--combinedlogslen=99999999",
         *shlex.split(os.environ.get("TEST_RUNNER_EXTRA", "").strip()),
         # feature_unsupported_utxo_db.py fails on Windows because of emojis in the test data directory.

.github/ci-windows.py

@@ -198,7 +198,7 @@ def run_tests(ci_type):
             "--jobs",
             num_procs,
             "--quiet",
-            f"--tmpdirprefix={workspace}",
+            f"--tmpdirprefix={workspace / '_ _'}",
             "--combinedlogslen=99999999",
             *shlex.split(os.environ.get("TEST_RUNNER_EXTRA", "").strip()),
         ]