Fix some missing cases from https://github.com/bazelbuild/bazel/commit/bbf3e421ed8b2b431a72cd3ab4ba591dc8833634.

For languages that use launchers, there are some requirements about files other than the main executable being co-located with the executable:

1. For Python, the .zip file must be alongside the executable.
2. For Shell, the shell file must be alongside the exe.

In addition, a .exe suffix is needed for launchers.

Tested that cc_test (non-launcher), java_test, py_test, sh_test (all launchers) work remotely when using the TEST_SHORT_EXEC_PATH env var.

RELNOTES: N/A
PiperOrigin-RevId: 200216308
diff --git a/tools/test/test-setup.sh b/tools/test/test-setup.sh
index fda8f00..d8f2a47 100755
--- a/tools/test/test-setup.sh
+++ b/tools/test/test-setup.sh
@@ -222,14 +222,24 @@
 # path to workaround a bug with long executable paths when executing remote
 # tests on Windows.
 if [ ! -z "$TEST_SHORT_EXEC_PATH" ]; then
-  # Use a short path like "t0" in the execution root. Use the smallest numeric
-  # suffix that doesn't collide with an existing file or directory.
   QUALIFIER=0
-  while [[ -e "${EXEC_ROOT}/t${QUALIFIER}" ]]; do
+  BASE="${EXEC_ROOT}/t${QUALIFIER}"
+  while [[ -e "${BASE}" || -e "${BASE}.exe" || -e "${BASE}.zip" ]]; do
     ((QUALIFIER++))
+    BASE="${EXEC_ROOT}/t${QUALIFIER}"
   done
-  ln -s "${TEST_PATH}" "${EXEC_ROOT}/t${QUALIFIER}"
-  TEST_PATH="${EXEC_ROOT}/t${QUALIFIER}"
+
+  # Note for the commands below: "ln -s" is equivalent to "cp" on Windows.
+
+  # Needs to be in the same directory for sh_test. Ignore the error when it
+  # doesn't exist.
+  ln -s "${TEST_PATH%.*}" "${BASE}" 2>/dev/null
+  # Needs to be in the same directory for py_test. Ignore the error when it
+  # doesn't exist.
+  ln -s "${TEST_PATH%.*}.zip" "${BASE}.zip" 2>/dev/null
+  # Needed for all tests.
+  ln -s "${TEST_PATH}" "${BASE}.exe"
+  TEST_PATH="${BASE}.exe"
 fi
 
 exitCode=0