NFC Unit tests part 1.1 (#1927)

* Mifare Classic 1/4K, 4/7b uid, NFC-A: NFC-A is not complete yet, as there are no 4b uid tests. Also, Mifare Classic tests don't cover the key cache yet.
* NFC unit tests require access to the NFC app
* Made nfc_device_save accept full path as an argument
* Move from cstrs to furi strings and fix logic
* nfc tests: fix memory leak
* nfc: add mf_classic_get_total_blocks() to API
* nfc tests: simplify nfc tests
* nfc: fix memory leak in shadow file saving
* nfc: fix set uid scene
* nfc: fix saving files
* nfc: fix preload nfc file path
* nfc: remove comments

Co-authored-by: Sergey Gavrilov <who.just.the.doctor@gmail.com>
Co-authored-by: gornekich <n.gorbadey@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>

firmware/targets/f7/api_symbols.csv

@@ -1,5 +1,5 @@
 entry,status,name,type,params
-Version,+,7.3,,
+Version,+,7.4,,
 Header,+,applications/services/bt/bt_service/bt.h,,
 Header,+,applications/services/cli/cli.h,,
 Header,+,applications/services/cli/cli_vcp.h,,
@@ -1844,6 +1844,7 @@ Function,-,mf_classic_get_read_sectors_and_keys,void,"MfClassicData*, uint8_t*,
 Function,-,mf_classic_get_sector_by_block,uint8_t,uint8_t
 Function,-,mf_classic_get_sector_trailer_block_num_by_sector,uint8_t,uint8_t
 Function,-,mf_classic_get_sector_trailer_by_sector,MfClassicSectorTrailer*,"MfClassicData*, uint8_t"
+Function,-,mf_classic_get_total_block_num,uint16_t,MfClassicType
 Function,-,mf_classic_get_total_sectors_num,uint8_t,MfClassicType
 Function,-,mf_classic_get_type_str,const char*,MfClassicType
 Function,-,mf_classic_is_allowed_access_data_block,_Bool,"MfClassicData*, uint8_t, MfClassicKey, MfClassicAction"