[nrf noup] [zephyr] Add config to enable watermarks support

Added a config to control enabling support for heap watermarks
within the Zephyr platform.

Author: ArekBalysNordic

config/zephyr/Kconfig

@@ -417,6 +417,12 @@ config CHIP_MALLOC_SYS_HEAP_SIZE
 	  the heap used by the memory allocation functions based on sys_heap from
 	  Zephyr RTOS.
 
+config CHIP_MALLOC_SYS_HEAP_WATERMARKS_SUPPORT
+	bool "Enable support for heap watermarks based on Zephyr sys_heap"
+	help
+	  Enables support for getting current heap high watermark and resetting 
+	  watermarks. 
+
 endif
 
 module = MATTER

src/platform/Zephyr/DiagnosticDataProviderImpl.cpp

@@ -123,7 +123,7 @@ DiagnosticDataProviderImpl::DiagnosticDataProviderImpl() : mBootReason(Determine
 
 bool DiagnosticDataProviderImpl::SupportsWatermarks()
 {
-#ifdef CONFIG_CHIP_MALLOC_SYS_HEAP
+#ifdef CONFIG_CHIP_MALLOC_SYS_HEAP && CHIP_MALLOC_SYS_HEAP_WATERMARKS_SUPPORT
     return true;
 #else
     return false;
@@ -165,7 +165,7 @@ CHIP_ERROR DiagnosticDataProviderImpl::GetCurrentHeapUsed(uint64_t & currentHeap
 
 CHIP_ERROR DiagnosticDataProviderImpl::GetCurrentHeapHighWatermark(uint64_t & currentHeapHighWatermark)
 {
-#ifdef CONFIG_CHIP_MALLOC_SYS_HEAP
+#ifdef CONFIG_CHIP_MALLOC_SYS_HEAP && CHIP_MALLOC_SYS_HEAP_WATERMARKS_SUPPORT
     Malloc::Stats stats;
     ReturnErrorOnFailure(Malloc::GetStats(stats));
 
@@ -178,7 +178,7 @@ CHIP_ERROR DiagnosticDataProviderImpl::GetCurrentHeapHighWatermark(uint64_t & cu
 
 CHIP_ERROR DiagnosticDataProviderImpl::ResetWatermarks()
 {
-#ifdef CONFIG_CHIP_MALLOC_SYS_HEAP
+#ifdef CONFIG_CHIP_MALLOC_SYS_HEAP && CHIP_MALLOC_SYS_HEAP_WATERMARKS_SUPPORT
     Malloc::ResetMaxStats();
     return CHIP_NO_ERROR;
 #else