[#21329] Style: Don't derive ptr alignment

Summary:
We seem to prefer
`const string& foo = "lorem ipsum";`
over
`const string &foo = "lorem ipsum";`

However, in spite of having  `PointerAlignment: Left`

`arcanist_util/pre_commit_hook.sh` sometimes prefers the latter due to  `DerivePointerAlignment: true`

more details here: https://stackoverflow.com/questions/56537847/why-do-the-pointeralignment-options-not-work
Jira: DB-10234

Test Plan:
run
arcanist_util/pre_commit_hook.sh

Reviewers: arybochkin, bogdan, rthallam, dmitry, sergei

Reviewed By: arybochkin

Subscribers: ybase

Differential Revision: https://phorge.dev.yugabyte.com/D32784

.clang-format

@@ -52,7 +52,7 @@ ConstructorInitializerAllOnOneLineOrOnePerLine: true
 ConstructorInitializerIndentWidth: 4
 ContinuationIndentWidth: 4
 Cpp11BracedListStyle: true
-DerivePointerAlignment: true
+DerivePointerAlignment: false
 DisableFormat:   false
 ExperimentalAutoDetectBinPacking: false
 ForEachMacros:   [ foreach, Q_FOREACH, BOOST_FOREACH ]