Gus Luxton

This is getting pretty nasty on MacOS. Apporoaching 6 seconds to run `tsh version` with a cold cache. ``` gus@apollo:~ % time tsh version Teleport v13.4.10 git:v13.4.10-0-gbe010bc go1.20.11 Proxy version:...

Weirdly, it's not... (also updated `tsh` since my last comment) ``` gus@apollo:~ % time tsh version --client Teleport v14.3.0 git:v14.3.0-0-g390d33c go1.21.5 tsh version --client 0.07s user 0.04s system 1% cpu...

Quick update - this isn't a code problem in itself. `tsh version --client` is taking 6 seconds to run: ``` gus@apollo:~ % time tsh version --client --trace --trace-exporter=grpc://localhost:4317 Teleport v14.3.0...

Related: https://github.com/gravitational/teleport/pull/34705

@BulatSaif Hi - this PR will require extensive unit tests to be added before it's considered for merging.

Another customer reported that they were affected by this issue today.

The ability to set a regex for validation of the reason would also work around the `.` issue. Nothing is going to be perfect, but requiring a reason that matches...