Various improvements: Toolbox, Updater and Unit Tests. (#2250)

* Toolbox: add seek to character stream method. UpdateUtils: reverse manifest iterator. UnitTests: more unit tests.
* Target: bump API version. Updater: delete empty folders from manifest before resource deployment.
* UnitTests: use manifest from unit_tests folder instead of global one
* Make PVS happy
* sector cache: allocate always
* Better PVS config for manifest.c
* PVS: Move exception outside of condition
* PVS: remove confusing condition

Co-authored-by: SG <who.just.the.doctor@gmail.com>

firmware/targets/f7/fatfs/sector_cache.c

@@ -8,6 +8,7 @@
 
 #define SECTOR_SIZE 512
 #define N_SECTORS 8
+#define TAG "SDCache"
 
 typedef struct {
     uint32_t itr;
@@ -19,14 +20,15 @@ static SectorCache* cache = NULL;
 
 void sector_cache_init() {
     if(cache == NULL) {
-        cache = furi_hal_memory_alloc(sizeof(SectorCache));
+        // TODO: tuneup allocation order, to place cache in mem pool (MEM2)
+        cache = memmgr_alloc_from_pool(sizeof(SectorCache));
     }
 
     if(cache != NULL) {
-        FURI_LOG_I("SectorCache", "Initializing sector cache");
+        FURI_LOG_I(TAG, "Init");
         memset(cache, 0, sizeof(SectorCache));
     } else {
-        FURI_LOG_E("SectorCache", "Cannot enable sector cache");
+        FURI_LOG_E(TAG, "Init failed");
     }
 }