feat(bt): Frees BLE memory when no longer in use

It will free libble.a & libbt all txt, data and bss segment memory.
          This memory is combined into one large memory and put into the heap
          pool.

components/bt/linker.lf.esp32c2

@@ -0,0 +1,60 @@
+[sections:bt_text]
+entries:
+    .iram1+
+
+[sections:bt_bss]
+entries:
+    .bss+
+    .sbss+
+
+[sections:bt_data]
+entries:
+    .data+
+    .sdata+
+    .dram1+
+
+[sections:bt_common]
+entries:
+    COMMON
+
+[scheme:bt_start_end]
+entries:
+    bt_text -> iram0_bt_text
+    bt_bss -> dram0_bt_bss
+    bt_common -> dram0_bt_bss
+    bt_data -> dram0_bt_data
+
+# For the following fragments, order matters for
+# 'ALIGN(4) ALIGN(4, post) SURROUND(sym)', which generates:
+#
+#   . = ALIGN(4)
+#   _sym_start
+#   ...
+#   . = ALIGN(4)
+#   _sym_end
+
+[mapping:bt]
+archive: libbt.a
+entries:
+    * (bt_start_end);
+        bt_bss -> dram0_bt_bss ALIGN(4) ALIGN(4, post) SURROUND(bt_bss),
+        bt_common -> dram0_bt_bss ALIGN(4) ALIGN(4, post) SURROUND(bt_common),
+        bt_data -> dram0_bt_data  ALIGN(4) ALIGN(4, post) SURROUND(bt_data)
+    if ESP_ALLOW_BSS_SEG_EXTERNAL_MEMORY = y:
+        * (extram_bss)
+
+[mapping:btdm]
+archive: libbtdm_app.a
+entries:
+    * (bt_start_end);
+        bt_bss -> dram0_bt_bss ALIGN(4) ALIGN(4, post) SURROUND(btdm_bss),
+        bt_common -> dram0_bt_bss ALIGN(4) ALIGN(4, post) SURROUND(btdm_common),
+        bt_data -> dram0_bt_data ALIGN(4) ALIGN(4, post) SURROUND(btdm_data)
+
+[mapping:bt_controller]
+archive: libble_app.a
+entries:
+    * (bt_start_end);
+        bt_bss -> dram0_bt_bss ALIGN(4) ALIGN(4, post) SURROUND(bt_controller_bss),
+        bt_common -> dram0_bt_bss ALIGN(4) ALIGN(4, post) SURROUND(bt_controller_common),
+        bt_data -> dram0_bt_data ALIGN(4) ALIGN(4, post) SURROUND(bt_controller_data)