Rollup merge of #160926 - davidtwco:sve-project-into-field-addl-test, r=folkertdev

sve: add addl. passing test for field projection

Adding additional test from [#t-libs/stdarch > CI is broken @ 💬](https://rust-lang.zulipchat.com/#narrow/channel/208962-t-libs.2Fstdarch/topic/CI.20is.20broken/near/615620739). I didn't use `minicore` for this test because it doesn't work with `--test`, and similarly cannot use `--target aarch64-unknown-linux-gnu` for the test because without minicore, it would fail on other targets. I confirmed that this fails without rust-lang/rust#160642.

r? @folkertdev