RFR: 8269823: JFR: Eliminate 'is_large' check for native JFR event if the size range is certain [v2]

[Denghui Dong]

On Wed, 7 Jul 2021 14:28:27 GMT, Erik Gahlin <egahlin at openjdk.org> wrote:

> The large check should only happen once

`if (written > 127) {` in EventWriterHost::end_event_write could also be eliminated.

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PR: https://git.openjdk.java.net/jdk/pull/4670