Imperial deployment

[J4bbi]

Description

This PR

• Fixes some inaccuracies in documentation and adds a bit more
• Adds configuration for a storage class for shared volumes in Azure
• Adds the option to have fixtures created in the initialisation job (note that this is an asynchronous task that takes several minutes)
• Adds the option to have Imperial Test Data imported during initialisation (see related PR to the repo)
• Confirms created users during initialisation
• Adds an initcontainer to the install init job to make the init job wait until OpenSearch is initialised
• Adds a configurable value for the readiness probes of web and worker to initally delay probing for longer because install init and OpenSearch take longer.
• Removes unnecessary config specific to InvenioRDM demo set deployment

Checklist

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