libcamera: Pass CameraManager around instead of GlobalConfiguration

The GlobalConfiguration is explicitly passed around through constructors
of various objects that need access to the configuration. This ad-hoc
solution works for the specific use cases it was meant to support, but
isn't very generic. We have a top-level object in libcamera, the
CameraManager, that also needs to be accessed from various locations and
is passed to object constructors. Standardize on passing the
CameraManager everywhere, and access the global configuration through
it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Isaac Scott <isaac.scott@ideasonboard.com>

include/libcamera/internal/software_isp/benchmark.h

@@ -13,15 +13,15 @@
 #include <stdint.h>
 #include <string>
 #include <time.h>
-#include <libcamera/base/log.h>
-#include "libcamera/internal/global_configuration.h"
 
 namespace libcamera {
 
+class CameraManager;
+
 class Benchmark
 {
 public:
-	Benchmark(const GlobalConfiguration &configuration, const std::string &name);
+	Benchmark(const CameraManager &cm, const std::string &name);
 	~Benchmark();
 
 	void startFrame(void);

include/libcamera/internal/software_isp/swstats_cpu.h

@@ -20,7 +20,6 @@
 
 #include "libcamera/internal/bayer_format.h"
 #include "libcamera/internal/framebuffer.h"
-#include "libcamera/internal/global_configuration.h"
 #include "libcamera/internal/shared_mem_object.h"
 #include "libcamera/internal/software_isp/swisp_stats.h"
 
@@ -28,14 +27,15 @@
 
 namespace libcamera {
 
-class PixelFormat;
+class CameraManager;
 class MappedFrameBuffer;
+class PixelFormat;
 struct StreamConfiguration;
 
 class SwStatsCpu
 {
 public:
-	SwStatsCpu(const GlobalConfiguration &configuration);
+	SwStatsCpu(const CameraManager &cm);
 	~SwStatsCpu() = default;
 
 	/*