patch 9.1.0827: CI: tests can be improved

Problem:  CI: tests can be improved
Solution: collect failed indent tests, raise timeout for search()
          functions when using ASAN/Valgrind (Aliaksei Budavei)

ASan-instrumented Vim builds tend to run slower (x2) than
non-instrumented Vim builds and occasionally make indent
tests fail when "search*()" functions time out and give up
further execution.

Reference:
https://github.com/google/sanitizers/wiki/AddressSanitizer

closes: #15974

Co-authored-by: Christian Brabandt <cb@256bit.org>
Signed-off-by: Aliaksei Budavei <0x000c70@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

.github/actions/test_artifacts/action.yml

@@ -1,5 +1,5 @@
-name: 'screendump'
-description: "Upload failed screendump tests"
+name: 'test_artifacts'
+description: "Upload failed test artifacts"
 runs:
   using: "composite"
   steps:
@@ -12,6 +12,7 @@ runs:
         # A file, directory or wildcard pattern that describes what
         # to upload.
         path: |
+         ${{ github.workspace }}/runtime/indent/testdir/*.fail
          ${{ github.workspace }}/runtime/syntax/testdir/failed/*
          ${{ github.workspace }}/src/testdir/failed/*
         # The desired behavior if no files are found using the