Update Rust to 1.73.0 #1439

Job	Run time
arm64 tests on Ubuntu (pg13, host)	27m 20s
x86_64 tests (pg13, ubuntu-latest, host)	29m 36s
arm64 tests on Ubuntu (pg13, postgrestd)	27m 10s
x86_64 tests (pg13, ubuntu-latest, postgrestd)	25m 22s
arm64 tests on Ubuntu (pg14, host)	28m 35s
x86_64 tests (pg14, ubuntu-latest, host)	26m 34s
arm64 tests on Ubuntu (pg14, postgrestd)	27m 7s
x86_64 tests (pg14, ubuntu-latest, postgrestd)	21m 54s
arm64 tests on Ubuntu (pg15, host)	29m 4s
x86_64 tests (pg15, ubuntu-latest, host)	26m 47s
arm64 tests on Ubuntu (pg15, postgrestd)	27m 35s
x86_64 tests (pg15, ubuntu-latest, postgrestd)	22m 6s
arm64 tests on Ubuntu (pg16, host)	29m 39s
x86_64 tests (pg16, ubuntu-latest, host)	35m 17s
arm64 tests on Ubuntu (pg16, postgrestd)	28m 30s
x86_64 tests (pg16, ubuntu-latest, postgrestd)	29m 40s
	7h 22m 16s

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