chore: Update tab-db2 plugin definition

[danielptv]

Replace kind: password with sensitive: true and add newly introduced config options.

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[danielptv]

Looks like sensitive: true is not yet supported by the schema validation. Or have I missed something?

[pnadolny13]

@danielptv thanks for the PR! sensitive is about to be added as part of #1667 (review). That should allow theses tests to pass.

[edgarrmondragon]

I don't think we should remove kind: password just yet :)

[danielptv]

@edgarrmondragon should I keep both kind: password and sensitive: true or only kind: password?

[edgarrmondragon]

@danielptv I think keeping both is the most sensible. We could update Meltano to only log the warnings when the corresponding future replacement is not in place.

[danielptv]

I have added back kind: password so both are now present.