[Security Solution][Detections] Updates MITRE ATT&CK mappings to v12.1 (

elastic#151931)

## Summary

Updates MITRE ATT&CK mappings to `v12.1`, see `detection-rules` repo
update here: elastic/detection-rules#2422. Last
update was to `v11.3` in elastic#137122.

To update,  I modified

https://github.com/elastic/kibana/blob/1a19148c1818b9af3b7735a0b6001bbb6bd8d7ba/x-pack/plugins/security_solution/scripts/extract_tactics_techniques_mitre.js#L22
to point to the `ATT&CK-v12.1` tag.

Then ran `yarn extract-mitre-attacks` from the root `security_solution`
plugin directory, and then `node scripts/i18n_check.js --fix` from
Kibana root to regen the i18n files.

### Checklist

- [X] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/master/packages/kbn-i18n/README.md)

(cherry picked from commit bbfa43a)