Move chronometric age to production

[timrobertson100]

The latest chronometric age extension that sits in the sandbox is ratified by TDWG and to be moved to production for GBIF-network use.

This requires:

• [x] A final check it works as expected in a test IPT (e.g. ipt.gbif.org)
• [x] Verification from @tucotuco of where it should go - I presume this is in the extensions/dwc folder?
• [x] Copied into the production extension folder
• [x] Remove the older versions of the extension from the sandbox (housekeeping)

[tucotuco]

Confirmed that the file should go in the extensions/dwc folder. Eveything in extemsions/zooarchnet is now obsolete.

[tucotuco]

Test publication with new extension successful. All looks good.

https://ipt.gbif.org/resource?r=flarch_zooarch_parnell_feature1_test

[timrobertson100]

You should be all set @tucotuco https://rs.gbif.org/extension/dwc/