patch 9.0.1819: Github CI too complex

Problem:  Github CI too complex
Solution: CI: Tidy up matrix

Perform the following changes to the CI configuration:
 - Move common CFLAGS to ci/config.mk.sed
 - Change extra key to array to able to assign no or multiple values
   explicitly
 - Modify luaver variable handling
   - lib${{ matrix.luaver }}-dev ${{ matrix.luaver }} are confusing
     as package names
 - Deduplicate CONFOPT setting

closes: #12955

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: ichizok <gclient.gaap@gmail.com>
diff --git a/src/version.c b/src/version.c
index 6aa73a0..8862ad4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1819,
+/**/
     1818,
 /**/
     1817,