heap: Remove TLSF related files and replace them with the tlsf submodule

As the tlsf implementation is a fork from https://github.com/mattconte/tlsf,
the sources are moved to a separate repository and used as a submodule in the esp-idf instead.

In this commit:
- Removing TLSF related files and using tlsf submodule instead.

- Adding components/heap/tlsf_platform.h header gathering all IDF specifics.

- The multi_heap_poisoning.c provides the declaration of the
function block_absorb_post_hook() definied weak in the TLSF repository.

- The tlsf_platform.h includes the tlsf_common.h file after the definition
of FL_INDEX_MAX_PLATFORM macro to make sure that this macro will be available
in tlsf_common.h without having to include tlaf_platform.h from IDF in the
tlsf_common.h header from the TLSF repository.

- Add missing include from tlsf_block_functions.h in the multi_heap.c file.
Change related to the changes made in TLSF repository (tlsf_block_functions.h
no longer included in tlsf.h)

.gitmodules

@@ -86,3 +86,7 @@
 [submodule "components/bt/controller/lib_esp32c2/esp32c2-bt-lib"]
 	path = components/bt/controller/lib_esp32c2/esp32c2-bt-lib
 	url = ../../espressif/esp32c2-bt-lib.git
+
+[submodule "components/heap/tlsf"]
+	path = components/heap/tlsf
+	url = ../../espressif/tlsf.git