Upgrade rust/crates/regex to 1.4.5 am: ffb6030a53 am: 5461377b71 am: 58996b6c89

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/regex/+/1663020

Change-Id: Iff37928c656f6da74cf19236958bc5f6f7cf5e95