clang-format: re-format for clang-19

clang-format-19 isn't compatible with the clang-format-18 output, so we
need to reformat the code with the latest version.  A few parameters
in clang-tidy have been deprecated, so adjust the style file
accordingly.

See Ie2f6eb3b043f2d655c9df806815afd7971fd0947 for updated style.
See I88192b41ab7a95599a90915013579608af7bc56f for clang-19 enablement.

Change-Id: I73ef7ee6dc13498d3fcbee4e5971028e61031ad0
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/.clang-format b/.clang-format
index 28e3328..a75a2c2 100644
--- a/.clang-format
+++ b/.clang-format
@@ -17,9 +17,7 @@
 AllowShortIfStatementsOnASingleLine: Never
 AllowShortLambdasOnASingleLine: true
 AllowShortLoopsOnASingleLine: false
-AlwaysBreakAfterReturnType: None
 AlwaysBreakBeforeMultilineStrings: false
-AlwaysBreakTemplateDeclarations: Yes
 BinPackArguments: true
 BinPackParameters: true
 BitFieldColonSpacing: None
@@ -43,12 +41,14 @@
   SplitEmptyRecord:     false
   SplitEmptyNamespace:  false
 BreakAfterAttributes: Never
+BreakAfterReturnType: Automatic
 BreakBeforeBinaryOperators: None
 BreakBeforeBraces: Custom
 BreakBeforeTernaryOperators: true
 BreakConstructorInitializers: AfterColon
 BreakInheritanceList: AfterColon
 BreakStringLiterals: false
+BreakTemplateDeclarations: Yes
 ColumnLimit:     80
 CommentPragmas:  '^ IWYU pragma:'
 CompactNamespaces: false
diff --git a/user_mgr.cpp b/user_mgr.cpp
index 22820e1..29c19f5 100644
--- a/user_mgr.cpp
+++ b/user_mgr.cpp
@@ -261,8 +261,8 @@
     }
 }
 
-void UserMgr::throwForMaxGrpUserCount(
-    const std::vector<std::string>& groupNames)
+void
+    UserMgr::throwForMaxGrpUserCount(const std::vector<std::string>& groupNames)
 {
     if (std::find(groupNames.begin(), groupNames.end(), "ipmi") !=
         groupNames.end())
@@ -884,8 +884,7 @@
     // All user management lock has to be based on /etc/shadow
     // TODO  phosphor-user-manager#10 phosphor::user::shadow::Lock lock{};
 
-    struct spwd spwd
-    {};
+    struct spwd spwd{};
     struct spwd* spwdPtr = nullptr;
     auto buflen = sysconf(_SC_GETPW_R_SIZE_MAX);
     if (buflen <= 0)