Initial commit of a fuzzer for Meshtastic (#5790)

* Initial commit of a fuzzer for Meshtastic.

* Use a max of 5 for the phone queues

* Only write files to the temp dir

* Limitless queue + fuzzer = lots of ram :)

* Use $PIO_ENV for path to program

* spelling: s/is/to/

* Use loopCanSleep instead of a lock in Router

* realHardware allows full use of a CPU core

* Ignore checkov CKV_DOCKER_2 & CKV_DOCKER_3

* Add Atak seed

* Fix lint issues in build.sh

* Use exception to exit from portduino_main

* Separate build & source files into $WORK & $SRC

* Use an ephemeral port for the API server

* Include CXXFLAGS in the link step

* Read all shared libraries

* Use a separate work directory for each sanitizer

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/mesh/PacketHistory.h

@@ -4,7 +4,11 @@
 #include <unordered_set>
 
 /// We clear our old flood record 10 minutes after we see the last of it
+#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+#define FLOOD_EXPIRE_TIME (5 * 1000L) // Don't allow too many packets to accumulate when fuzzing.
+#else
 #define FLOOD_EXPIRE_TIME (10 * 60 * 1000L)
+#endif
 
 /**
  * A record of a recent message broadcast