HHH-18314, HHH-18316, HHH-18317 @Nationalized strings on Db2, MySQL, and Sybase (backport to H6)

[gavinking]

[Please describe here what your change is about]

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https://hibernate.atlassian.net/browse/HHH-18314 https://hibernate.atlassian.net/browse/HHH-18317 https://hibernate.atlassian.net/browse/HHH-18316

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[gavinking]

So I decided I'm too much of a coward to merge this to the 6.6 branch (especially at this late stage).

Instead I will apply this changes to the H7 branch.

But if anyone does want to see them in H6 .... well, just merge this PR.

[gavinking]

So I decided I'm too much of a coward to merge this to the 6.6 branch (especially at this late stage).

But if anyone does want to see them in H6 .... well, just merge this PR.

Looks like everyone else shared my cowardice.

Closing this.