RFR: 8256414: add optimized build to submit workflow [v2]

[Daniel D.Daugherty]

On Mon, 16 Nov 2020 19:29:59 GMT, Igor Ignatyev <iignatyev at openjdk.org> wrote:

>> Marked as reviewed by shade (Reviewer).
>
> Thanks for the reviews, folks. the build looks green, integrating.

@iignatev - did you also change Mach5? I don't have workflow builds enabled
by default since I typically do Mach5 builds...

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PR: https://git.openjdk.java.net/jdk/pull/1233