postgresql: add ptest support

Add ptest infrastructure to run the PostgreSQL standard regression test
suite (pg_regress) on the target system.

Test logs:
root@qemux86-64:~# ptest-runner postgresql
START: ptest-runner
2026-03-24T02:42
BEGIN: /usr/lib64/postgresql/ptest
.....
**if all pass **
PASS: - event_trigger_login                      1901 ms
PASS: - fast_default                             9459 ms
PASS: - tablespace                              16542 ms
PASS: all tests passed

**if have fail**
FAIL: create_type                              1763 ms
PASS: create_schema                            2123 ms
PASS: - tablespace                              23226 ms
FAIL: some tests failed

waiting for server to shut down.... done
server stopped
DURATION: 853
END: /usr/lib64/postgresql/ptest
2026-03-24T02:56
STOP: ptest-runner
TOTAL: 1 FAIL: 0

Signed-off-by: Guocai He <guocai.he.cn@windriver.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta-oe/conf/include/ptest-packagelists-meta-oe.inc b/meta-oe/conf/include/ptest-packagelists-meta-oe.inc
index e88e50b59c..a4398dd7e4 100644
--- a/meta-oe/conf/include/ptest-packagelists-meta-oe.inc
+++ b/meta-oe/conf/include/ptest-packagelists-meta-oe.inc
@@ -77,6 +77,7 @@ PTESTS_SLOW_META_OE = "\
     fftw \
     libusb-compat \
     mariadb \
+    postgresql \
     re2 \
     rocksdb \
 "