Support existing bootstrap experience with new JDBC module

[singhpk234]

Describe the bug

please ref : #1371 (comment)

Essentially for multiple realms with 1 Datasource per realm we need to pre-configure quarkus before running the bootstrap tool, we should restore the prev experience where eclipselink didn't required it.

To Reproduce

No response

Actual Behavior

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Expected Behavior

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Additional context

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System information

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[dimas-b]

I'm not sure about the "restore" and "existing" suggestions in the description... The experience is more-or-less the same as with EclipseLink, is it not?