RFR: 6812: Rules 2.0 [v10]

[Guru Hb]

On Wed, 9 Dec 2020 14:35:56 GMT, Henrik Dafgård <hdafgard at openjdk.org> wrote:

>> This PR will merge the new, breaking, API changes for Rules 2.0 as well as updates to all JMC IRule implementations, the JMC GUI and exporting functionality.
>
> Henrik Dafgård has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix incorrect rule outputs

Verified on Mac and Windows, Opened few jfr (other than our test ones) and didn't see any exception or failure. 

Please fix the formatting errors reported by spotless before integrating.

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Marked as reviewed by ghb (Reviewer).

PR: https://git.openjdk.java.net/jmc/pull/163