heap: Fix compilation errors when CONFIG_HEAP_TLSF_USE_ROM_IMPL is set

- include headers from the tlsf submodule only when CONFIG_HEAP_TLSF_USE_ROM_IMPL is not set
- remove usage of the tlsf_t type in the multi_heap.c
- add missing declaration of tlsf_poison_fill_pfunc_set() in multi_heap_poisoning.c
- define headers from tlsf submodule as private
- update the linker file in the heap component to the new naming of the tlsf file
- update the copyright docuementation to reference the submodule in github (https://github.com/espressif/tlsf)
- remove deleted files from the check_copyright_ignore.txt

components/heap/multi_heap.c

@@ -11,11 +11,14 @@
 #include <stddef.h>
 #include <stdio.h>
 #include <sys/cdefs.h>
-#include "tlsf.h"
-#include "tlsf_block_functions.h"
 #include "multi_heap.h"
 #include "multi_heap_internal.h"
 
+#if !CONFIG_HEAP_TLSF_USE_ROM_IMPL
+#include "tlsf.h"
+#include "tlsf_block_functions.h"
+#endif
+
 /* Note: Keep platform-specific parts in this header, this source
    file should depend on libc only */
 #include "multi_heap_platform.h"
@@ -75,7 +78,7 @@ typedef struct multi_heap_info {
     size_t free_bytes;
     size_t minimum_free_bytes;
     size_t pool_size;
-    tlsf_t heap_data;
+    void* heap_data;
 } heap_t;
 
 #ifdef CONFIG_HEAP_TLSF_USE_ROM_IMPL