[FL-3889] 5V on GPIO control for ext. modules (#3830)

* Make file extensions case-insensitive
* Bump protobuf version
* Add support for 5V control via RPC
* Add support for 5V control via Expansion protocol
* Update running instructions
* Update expansion module documentation
* Prettify condition
* Test RPC OTG control as well
* Assets: bump protobuf version
* Disable PVS license expiration check, fix PVS warnings

Co-authored-by: あく <alleteam@gmail.com>

scripts/fbt_tools/pvsstudio.py

@@ -47,6 +47,7 @@ def generate(env):
         PVSOPTIONS=[
             "@.pvsoptions",
             "-j${PVSNCORES}",
+            "--disableLicenseExpirationCheck",
             # "--incremental", # kinda broken on PVS side
         ],
         PVSCONVOPTIONS=[