Upgrade pest_generator to 2.5.5 am: 2e36314e24 am: 69662c3e5d am: c2a5a62530

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pest_generator/+/2441180

Change-Id: Ic5fa5394f7820a54830d890469b47b60ee48fb33
Signed-off-by: Automerger Merge Worker <[email protected]>