RFR: 7903727: Remove the reliance on String Templates feature [v5]

[Nizar Benalla]

On Tue, 4 Jun 2024 10:13:12 GMT, Nizar Benalla <nbenalla at openjdk.org> wrote:

>> This PR aims to replace the usage of string templates with `String::format`, since there will be no string template feature in JDK 23.
>> I tried to keep similar indentation and convert them in-place, to make reviewing the changes easier.
>
> Nizar Benalla has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove space, to not appear in the diff

Thanks for the second round of review, I will fix these carefully today.
And I have enabled github actions.

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PR Comment: https://git.openjdk.org/jextract/pull/244#issuecomment-2147486663