Python: add FUNCTION DUMP and FUNCTION RESTORE commands #4486

Job	Run time
load-engine-matrix	5s
lint-rust	55s
build-amazonlinux-latest	4m 19s
build-macos-latest	3m 8s
test-ubuntu-latest (valkey, 7.2.5, 3.8)	2m 1s
test-ubuntu-latest (valkey, 7.2.5, 3.9)	1m 57s
test-ubuntu-latest (valkey, 7.2.5, 3.10)	1m 59s
test-ubuntu-latest (valkey, 7.2.5, 3.11)	1m 57s
test-ubuntu-latest (valkey, 7.2.5, 3.12)	1m 58s
test-ubuntu-latest (valkey, redis-7.0.15, 3.8)	1m 57s
test-ubuntu-latest (valkey, redis-7.0.15, 3.9)	1m 54s
test-ubuntu-latest (valkey, redis-7.0.15, 3.10)	1m 56s
test-ubuntu-latest (valkey, redis-7.0.15, 3.11)	1m 56s
test-ubuntu-latest (valkey, redis-7.0.15, 3.12)	1m 53s
test-ubuntu-latest (valkey, redis-6.2.14, 3.8)	2m 3s
test-ubuntu-latest (valkey, redis-6.2.14, 3.9)	2m 4s
test-ubuntu-latest (valkey, redis-6.2.14, 3.10)	1m 58s
test-ubuntu-latest (valkey, redis-6.2.14, 3.11)	2m 2s
test-ubuntu-latest (valkey, redis-6.2.14, 3.12)	2m 3s
	38m 5s

Provide feedback