Add 95th height history variable

[JessicaNeedham]

Description:

This PR adds a history variable that calculates a gridcell-level height that is the average across all patchs of the 95th percentile height. This allows us to compare with GEDI and other spaceborne or airborne lidar-derived metrics. Changes are from PR NGEET#1485 on the NGEET repo: NGEET#1485. It would be useful if we had these on the NorESM side for current calibration efforts.

Collaborators:

@rosiealice

Expectation of Answer Changes:

Should not change science - only adds a FATES history variable.

Checklist:

• My change requires a change to the documentation.
• I have updated the in-code documentation .AND. (the technical note .OR. the wiki) accordingly.
• I have read the CONTRIBUTING document.
• FATES PASS/FAIL regression tests were run
• If answers were expected to change, evaluation was performed and provided

Test Results:

Compiles