WIP: inject closure-calls for loop externs in closures #3996

Job	Run time
build (1.21.x, GOARCH=amd64 GOOS=linux, gno)	14s
build (1.21.x, GOARCH=wasm GOOS=js, gno)	23s
build (1.22.x, GOARCH=amd64 GOOS=linux, gno)	15s
build (1.22.x, GOARCH=wasm GOOS=js, gno)	21s
test (1.21.x, _test.cmd)	59s
test (1.21.x, _test.pkg)	31s
test (1.21.x, _test.gnolang.native)	22s
test (1.21.x, _test.gnolang.stdlibs)	50s
test (1.21.x, _test.gnolang.realm)	23s
test (1.21.x, _test.gnolang.pkg0)	1m 5s
test (1.21.x, _test.gnolang.pkg1)	5m 53s
test (1.21.x, _test.gnolang.pkg2)	19s
test (1.21.x, _test.gnolang.other)	18s
test (1.22.x, _test.cmd)	56s
test (1.22.x, _test.pkg)	36s
test (1.22.x, _test.gnolang.native)	31s
test (1.22.x, _test.gnolang.stdlibs)	43s
test (1.22.x, _test.gnolang.realm)	24s
test (1.22.x, _test.gnolang.pkg0)	1m 0s
test (1.22.x, _test.gnolang.pkg1)	5m 48s
test (1.22.x, _test.gnolang.pkg2)	29s
test (1.22.x, _test.gnolang.other)	20s
upload-coverage	0s
	22m 40s

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