feat: add `simulate` RPC to dry-run a tx (XLS-69d) #4179

Job	Run time
dependencies (linux, gcc, Debug)	3m 20s
dependencies (linux, gcc, Release)	2m 14s
dependencies (linux, clang, Debug)	2m 48s
dependencies (linux, clang, Release)	2m 12s
conan	2m 45s
coverage (linux, gcc, Debug)	13m 2s
test (linux, gcc, Debug)	11m 21s
test (linux, gcc, Debug, -Dunity=ON)	7m 53s
test (linux, gcc, Release)	11m 59s
test (linux, gcc, Release, -Dunity=ON)	8m 13s
test (linux, clang, Debug)	9m 11s
test (linux, clang, Debug, -Dunity=ON)	6m 21s
test (linux, clang, Release)	11m 12s
test (linux, clang, Release, -Dunity=ON)	8m 17s
	1h 40m 48s

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