Limit commands outside of maintenance hours

[nickvergessen]

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Is your feature request related to a problem? Please describe.
There are occ commands which are very disruptive and can even create downtimes for minutes and hours.

Describe the solution you'd like
Since #30945 a "maintenance window" can be configured.

When a disruptive command is being executed outside of the maintenance hours we should highlight that and ask for a quick confirmation first.

The following commands come to mind:

• app:update
• db:add-missing-columns
• db:add-missing-indices
• db:add-missing-primary-keys
• db:convert-filecache-bigint
• db:convert-mysql-charset
• db:convert-type
• encryption:decrypt-all
• encryption:encrypt-all
• maintenance:repair --include-expensive

[colttt]

#29646 is somehow related