clk: test: Add test managed of_clk_add_hw_provider()

Add a test managed version of of_clk_add_hw_provider() that
automatically unregisters the clk_hw provider upon test conclusion.

Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Cc: Rae Moar <rmoar@google.com>
Cc: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20240822002433.1163814-2-sboyd@kernel.org