RFR: 8328919: Add BodyHandlers / BodySubscribers methods to handle excessive server input [v4]

[Volkan Yazıcı]

> Adds `limiting()` factory methods to `HttpResponse.Body{Handlers,Subscribers}` to handle excessive server input in `HttpClient`. I would appreciate your input whether `discardExcess` should be kept or dropped. I plan to file a CSR once there is an agreement on the PR.

Volkan Yazıcı has updated the pull request incrementally with four additional commits since the last revision:

 - Fix JavaDoc typo
 - Apply review suggestion on if-else nesting
 - Use `AtomicLong` for the length counter
 - Check `capacity` in `limiting()`

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Changes:
  - all: https://git.openjdk.org/jdk/pull/23096/files
  - new: https://git.openjdk.org/jdk/pull/23096/files/a4fd1bab..1051e3e9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23096&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23096&range=02-03

  Stats: 26 lines in 3 files changed: 14 ins; 2 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/23096.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23096/head:pull/23096

PR: https://git.openjdk.org/jdk/pull/23096