clang-format: Add config option to allow function parameters to be displayed on separate lines

[ameerj]

For AMD's PAL library, the style guidelines require each parameter in a function definition to occupy a separate line.

For example:

void SomeFunction(
    int param)
{
}

void SomeOtherFunction(
    int  param,
    bool cond)
{
}

There does not seem to be any configuration for clang-format to achieve this style.

[llvmbot]

@llvm/issue-subscribers-clang-format

[EugeneZelenko]

It'll be great to also have option which allows function declaration/definition to be in single line if it fits in ColumnLimit, and break otherwise.