Update ESMValTool metric and output bundles

[bouweandela]

Description

Closes #235

Checklist

Please confirm that this pull request has done the following:

• Tests added
• Documentation added (where applicable)
• Changelog item added to changelog/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ
...ol/src/cmip_ref_metrics_esmvaltool/metrics/base.py	100.00% <100.00%> (ø)
...ool/src/cmip_ref_metrics_esmvaltool/metrics/ecs.py	100.00% <100.00%> (ø)
...src/cmip_ref_metrics_esmvaltool/metrics/example.py	100.00% <100.00%> (ø)
...ool/src/cmip_ref_metrics_esmvaltool/metrics/tcr.py	100.00% <100.00%> (ø)
...ol/src/cmip_ref_metrics_esmvaltool/metrics/tcre.py	100.00% <100.00%> (ø)
...ool/src/cmip_ref_metrics_esmvaltool/metrics/zec.py	100.00% <100.00%> (ø)
...smvaltool/src/cmip_ref_metrics_esmvaltool/types.py	100.00% <100.00%> (ø)

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[minxu74]

Great! Thanks.