Cryptsetup should indicate if caps lock is on

[mark johnson]

When cryptsetup presents the password challenge at boot, it does not provide any indication if Caps Lock is on (as, for example, the GDM login screen does). This has caused my colleages and I issues entering out encryption password, as the caps lock indicator on our laptop keyboards does not show at this point in the boot process.

Steps to reproduce:
* Boot a system with an encrypted drive
* At the cryptsetup password prompt, press the capslock key
* EXPECTED: An indication is shown if caps lock is on.
* ACTUAL: No indication is shown.

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: cryptsetup 2:2.3.7-0ubuntu0.21.10.1
ProcVersionSignature: Ubuntu 5.13.0-51.58-generic 5.13.19
Uname: Linux 5.13.0-51-generic x86_64
ApportVersion: 2.20.11-0ubuntu71.2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed Jun 29 11:07:30 2022
InstallationDate: Installed on 2022-02-11 (137 days ago)
InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: cryptsetup
UpgradeStatus: Upgraded to impish on 2022-02-23 (125 days ago)
cmdline: BOOT_IMAGE=/vmlinuz-5.13.0-51-generic root=/dev/mapper/vgubuntu-root ro quiet splash resume=UUID=eb91b6dd-0fee-4099-a869-6cc3c124ebaa resume_offset=13047808
crypttab: nvme0n1p3_crypt UUID=57efd2b7-01f2-4d81-8905-7f9cfe4b88b8 none luks,discard