chore: fix ts build

[bennypowers]

What I did

futz with the typescript configs and fix some typescript errors in various test files

should unblock release (see https://github.com/patternfly/patternfly-elements/actions/runs/3780052452/jobs/6425817091)

this was cherry-picked from #2283

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Latest commit: 870a296

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[github-actions]

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