Upgrade rust/crates/regex to 1.4.5 am: ffb6030a53 am: 5461377b71 am: 58996b6c89 am: b6bd22e71f

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

Change-Id: I45dc2676f4b313a763fe873bbbb2bbac4d313d1b