fix(gnovm): assignment operators require 1 expression on both sides #4763

Job	Run time
build (1.21.x, GOARCH=amd64 GOOS=linux, gno)	15s
build (1.21.x, GOARCH=wasm GOOS=js, gno)	26s
test (1.21.x, _test.cmd)	1m 21s
build (1.22.x, GOARCH=amd64 GOOS=linux, gno)	23s
test (1.21.x, _test.pkg)	36s
build (1.22.x, GOARCH=wasm GOOS=js, gno)	29s
test (1.21.x, _test.gnolang.native)	29s
test (1.21.x, _test.gnolang.stdlibs)	57s
test (1.21.x, _test.gnolang.realm)	36s
test (1.21.x, _test.gnolang.pkg0)	1m 42s
test (1.21.x, _test.gnolang.pkg1)	9m 31s
test (1.21.x, _test.gnolang.pkg2)	4m 4s
test (1.21.x, _test.gnolang.other)	19s
test (1.22.x, _test.cmd)	1m 23s
test (1.22.x, _test.pkg)	40s
test (1.22.x, _test.gnolang.native)	24s
test (1.22.x, _test.gnolang.stdlibs)	59s
test (1.22.x, _test.gnolang.realm)	32s
test (1.22.x, _test.gnolang.pkg0)	1m 49s
test (1.22.x, _test.gnolang.pkg1)	9m 31s
test (1.22.x, _test.gnolang.pkg2)	3m 58s
test (1.22.x, _test.gnolang.other)	19s
upload-coverage	15s
	40m 58s

Provide feedback