[q] vendor/eos: Add an RRO for PowerOffAlarm

Description

vendor/eos: Add an RRO for PowerOffAlarm

Issue(s)

e/backlog#5530 (closed)

Test environment

• Make a build with the following parameters:
• DEVICES: FP3
• BRANCH_NAME: v1-q
• FEATURE_BRANCH: 5530-q-translate_poweroffalarm

Job: https://gitlab.e.foundation/e/priv/os/build/-/jobs/350993/artifacts/file/zips/FP3/e-1.2-q-20220719204489-test-FP3.zip

Test procedures

• The string mentioned in the issue is translated in German

Check list

• Self review
• Test procedure explained
• Tested on fresh install
• Tested applied as an update
• License
• Internal documentation
• User documentation