RFR: 8330954: Fix remaining `@since` tags in `java.base`

[Jonathan Gibbons]

While `@since` might not be considered a normative part of the 
specification, (it's effectively a cache of derived meta-data) it is 
part of the generated documentation, and as such deserves to be correct.

-- Jon

On 5/5/24 4:33 PM, Pavel Rappo wrote:
> On Mon, 29 Apr 2024 17:46:24 GMT, Nizar Benalla <duke at openjdk.org> wrote:
>
>> Pavel, can I simply change the PR/issue title to be more descriptive? As I want to include the the inherit doc because of the unchecked exceptions, rather than clean this up in a different PR
> I suggest dropping all the changes that are irrelevant to `@since` from this PR, unless you have PRs with similar mixed changes integrated. As far as I know, `@since` is not a normative part of documentation, whereas `@throws` is. So the latter is a bigger change and would require more scrutiny and more area experts during review.
>
> In the future, we might want to have yet another aid/tool: a "`@throws` checker" that finds all overriding methods that do not declare some of the unchecked exceptions that the methods they override do.
>
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> PR Review Comment: https://git.openjdk.org/jdk/pull/18954#discussion_r1583618873