device: Const-ify all device driver instance pointers

Now that device_api attribute is unmodified at runtime, as well as all
the other attributes, it is possible to switch all device driver
instance to be constant.

A coccinelle rule is used for this:

@r_const_dev_1
  disable optional_qualifier
@
@@
-struct device *
+const struct device *

@r_const_dev_2
 disable optional_qualifier
@
@@
-struct device * const
+const struct device *

Fixes #27399

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>

tests/application_development/cpp/src/main.cpp

@@ -50,7 +50,7 @@ static struct foo foos[5];
 BUILD_ASSERT(ARRAY_SIZE(foos) == 5, "expected 5 elements");
 
 /* Check that SYS_INIT() compiles. */
-static int test_init(struct device *dev)
+static int test_init(const struct device *dev)
 {
 	return 0;
 }