Update kotlin (#6142)
* Update kotlin to `v2.3.10`
* Don't use the `-0.6.x-compat` version for datetime
* Update kotlinc file contents
* Try to make Renovate ignore the non-semver versions for `kotlinx-datetime`
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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Jorge MartÃn <jorgem@element.io>