Optimize builds to reduce duplicate dependency checks (#8943)

'mtjson' will now build all required pieces when they don't exist

bin/platformio-pre.py

@@ -11,6 +11,9 @@ else:
     prefsLoc = env["PROJECT_DIR"] + "/version.properties"
     verObj = readProps(prefsLoc)
     env.Replace(PROGNAME=f"firmware-{env.get('PIOENV')}-{verObj['long']}")
+    env.Replace(ESP32_FS_IMAGE_NAME=f"littlefs-{env.get('PIOENV')}-{verObj['long']}")
 
 # Print the new program name for verification
 print(f"PROGNAME: {env.get('PROGNAME')}")
+if platform.name == "espressif32":
+    print(f"ESP32_FS_IMAGE_NAME: {env.get('ESP32_FS_IMAGE_NAME')}")