RFR: 7903779: unify logger messages to show position whenever possible

[Jorn Vernee]

On Thu, 25 Jul 2024 12:28:51 GMT, Athijegannathan Sundararajan <sundar at openjdk.org> wrote:

> * logger.warn/.err/.info Position accepting overloads.
> * Error message format is: <position>:"fatal"|"error"|"warning"|"info"|:<message> (consistent with clang).
> * ClangException has position, severity and spelling. ClangExceptions are printed using logger.print.

Marked as reviewed by jvernee (Committer).

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PR Review: https://git.openjdk.org/jextract/pull/254#pullrequestreview-2199195426