fix(gnovm): prevent assignment to non-assignable expressions #5843

Job	Run time
setup	3s
Run Main (gnodev) / Go Linter / lint	52s
Run Main (gnodev) / Go Build / generated	12s
Run Main (gnodev) / Go Test / test	1m 10s
Run Main (gnofaucet) / Go Build / generated	7s
Run Main (gnofaucet) / Go Linter / lint	28s
Run Main (gnofaucet) / Go Test / test	39s
Run Main (gnogenesis) / Go Build / generated	9s
Run Main (gnogenesis) / Go Linter / lint	41s
Run Main (gnogenesis) / Go Test / test	46s
Run Main (gnokeykc) / Go Build / generated	12s
Run Main (gnokeykc) / Go Linter / lint	35s
Run Main (gnokeykc) / Go Test / test	41s
Run Main (gnomd) / Go Build / generated	6s
Run Main (gnomd) / Go Linter / lint	21s
Run Main (gnomd) / Go Test / test	28s
	7m 30s

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