linker: cpp: Fix C++ exception handling info section linking

The `.eh_frame_hdr` and `.eh_frame` ROM sections, which contain read-
only C++ exception handling information, are currently specified in
`cplusplus-ram.ld`, and this can cause the linker output location
counter to take a ROM region address while in the RAM region.

This commit relocates these sections to `cplusplus-rom.ld` in order to
prevent the linker output location counter from getting corrupted.

For more details, refer to the issue #35972.

Signed-off-by: Stephanos Ioannidis <root@stephanos.io>

include/linker/cplusplus-ram.ld

@@ -11,17 +11,6 @@
 	} GROUP_DATA_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
 
 #if defined (CONFIG_EXCEPTIONS)
-    SECTION_PROLOGUE(.eh_frame_hdr,,)
-	{
-	*(.eh_frame_hdr)
-	}
-
-    SECTION_PROLOGUE(.eh_frame,,)
-	{
-	KEEP (*(SORT_NONE(EXCLUDE_FILE (*crtend.o) .eh_frame)))
-	KEEP (*(SORT_NONE(.eh_frame)))
-	} GROUP_LINK_IN(ROMABLE_REGION)
-
     SECTION_PROLOGUE(.tm_clone_table,,)
 	{
 	KEEP (*(SORT_NONE(EXCLUDE_FILE (*crtend.o) .tm_clone_table)))

include/linker/cplusplus-rom.ld

@@ -9,4 +9,18 @@
 	{
 	*(.gcc_except_table .gcc_except_table.*)
 	} GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
-#endif
+
+#if defined (CONFIG_EXCEPTIONS)
+	SECTION_PROLOGUE(.eh_frame_hdr,,)
+	{
+	*(.eh_frame_hdr)
+	} GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
+
+	SECTION_PROLOGUE(.eh_frame,,)
+	{
+	KEEP (*(SORT_NONE(EXCLUDE_FILE (*crtend.o) .eh_frame)))
+	KEEP (*(SORT_NONE(.eh_frame)))
+	} GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
+#endif /* CONFIG_EXCEPTIONS */
+
+#endif /* CONFIG_CPLUSPLUS */