test/fuzz: move fuzz tests into this repo (#5918)

Co-authored-by: Emmanuel T Odeke <emmanuel@orijtech.com>

Closes #5907

- add init-corpus to blockchain reactor
- remove validator-set FromBytes test
now that we have proto, we don't need to test it! bye amino
- simplify mempool test
do we want to test remote ABCI app?
- do not recreate mux on every crash in jsonrpc test
- update p2p pex reactor test
- remove p2p/listener test
the API has changed + I did not understand what it's tested anyway
- update secretconnection test
- add readme and makefile
- list inputs in readme
- add nightly workflow
- remove blockchain fuzz test
EncodeMsg / DecodeMsg no longer exist

test/fuzz/Makefile

@@ -0,0 +1,39 @@
+#!/usr/bin/make -f
+
+.PHONY: fuzz-mempool
+fuzz-mempool:
+	cd mempool && \
+		rm -f *-fuzz.zip && \
+		go-fuzz-build && \
+		go-fuzz
+
+.PHONY: fuzz-p2p-addrbook
+fuzz-p2p-addrbook:
+	cd p2p/addrbook && \
+		rm -f *-fuzz.zip && \
+		go run ./init-corpus/main.go && \
+		go-fuzz-build && \
+		go-fuzz
+
+.PHONY: fuzz-p2p-pex
+fuzz-p2p-pex:
+	cd p2p/pex && \
+		rm -f *-fuzz.zip && \
+		go run ./init-corpus/main.go && \
+		go-fuzz-build && \
+		go-fuzz
+
+.PHONY: fuzz-p2p-sc
+fuzz-p2p-sc:
+	cd p2p/secret_connection && \
+		rm -f *-fuzz.zip && \
+		go run ./init-corpus/main.go && \
+		go-fuzz-build && \
+		go-fuzz
+
+.PHONY: fuzz-rpc-server
+fuzz-rpc-server:
+	cd rpc/jsonrpc/server && \
+		rm -f *-fuzz.zip && \
+		go-fuzz-build && \
+		go-fuzz