RFR: JDK-8289541 : Update ICU4C to 71.1 [v6]

Wed Sep 21 16:42:08 UTC 2022

On Wed, 21 Sep 2022 16:32:09 GMT, Hima Bindu Meda <hmeda at openjdk.org> wrote:

>> Updated icu to v71.1.
>> Verified build and sanity testing on windows,Mac and Linux.
>> Removed icu directory from Source/WTF, as the functionality is already provided by Source/ThirdParty/icu
>
> Hima Bindu Meda has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Space corrections

Approved.

The `icu_web.md` file looks good now. All other testing and review was previously done.

@johanvos or @tiainen can you do a test build?

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Marked as reviewed by kcr (Lead).

PR: https://git.openjdk.org/jfx/pull/893