Clang-format: better match code policy example for constructors

AllowAllConstructorInitializersOnNextLine and
ConstructorInitializerAllOnOneLineOrOnePerLine are both deprecated.

PackConstructorInitializers=Never is the most similar setting to
most code and the example in the policy document. E.g. this does not
get reformatted:

    STRINGFORMATTER( int aReserve = 300 ) :
        buffer( aReserve, '\0' )
    {
    }

_clang-format

@@ -6,7 +6,6 @@ AlignConsecutiveAssignments: false
 AlignConsecutiveDeclarations: true
 AlignOperands: true
 AlignTrailingComments: true
-AllowAllConstructorInitializersOnNextLine: false
 AllowAllParametersOfDeclarationOnNextLine: false
 AllowShortBlocksOnASingleLine: Never
 AllowShortCaseLabelsOnASingleLine: true
@@ -25,7 +24,6 @@ BreakBeforeTernaryOperators: true
 BreakConstructorInitializers: AfterColon
 BreakStringLiterals: true
 ColumnLimit: 120
-ConstructorInitializerAllOnOneLineOrOnePerLine: false
 ConstructorInitializerIndentWidth: 8
 ContinuationIndentWidth: 8
 Cpp11BracedListStyle: false
@@ -39,6 +37,7 @@ KeepEmptyLinesAtTheStartOfBlocks: false
 Language: Cpp
 MaxEmptyLinesToKeep: 2
 NamespaceIndentation: Inner
+PackConstructorInitializers: Never
 PointerAlignment: Left
 ReflowComments: false
 SortIncludes: false