Improve Sanitizer checks

This patch contains two changes to the Sanitizer checks:

(1) All logfiles of the Sanitizer will be uploaded to the
    CI database.

(2) The Sanitizer checks are executed on every PR.

.github/workflows/sanitizer-build-and-test.yaml

@@ -7,6 +7,8 @@ on:
   push:
     branches:
       - prerelease_test
+  pull_request:
+
 env:
   name: "Sanitizer"
   PG_SRC_DIR: "pgbuild"

scripts/upload_ci_stats.sh

@@ -182,7 +182,7 @@ match($0, /^(test|    ) ([^ ]+)[ ]+\.\.\.[ ]+([^ ]+) (|\(.*\))[ ]+([0-9]+) ms$/,
 "${PSQL[@]}" -c "\copy test from tests.tsv"
 
 # Upload the logs.
-for x in {sanitizer,stacktrace,postgres-failure}.log *.diff
+for x in sanitizer/* {sanitizer,stacktrace,postgres-failure}.log *.diff
 do
     if ! [ -e "$x" ]; then continue ; fi
     "${PSQL[@]}" <<<"