RFR: 8310332: Fix -Wconversion warnings in MethodData [v2]

[Frederic Parain]

On Tue, 20 Jun 2023 13:23:06 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Please review this change to narrow parameter and return types to avoid implicit casts, add casts where obvious, add checked_cast<> where not obvious and changed the size of a couple parameters to not cast to the smaller size.
>> I didn't change TypeProfileWidth and BciProfileWidth because jvmci and SA care about the sizes.
>> Tested tier1 all Oracle supported platforms, and tier1-4 linux + windows x64.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add a checked_cast<>

Marked as reviewed by fparain (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/14557#pullrequestreview-1488213707