2998 update changelogs for v3 release

[gd2910]

Summary of the changes

Squashed v3 changelogs into one log for v3 release

Related issue

#2998

[github-actions]

View your branch deployment here: https://mi6.github.io/ic-ui-kit/branches/2998-update-changelogs-for-v3-release/web-components
View your React branch deployment here: https://mi6.github.io/ic-ui-kit/branches/2998-update-changelogs-for-v3-release/react

[ad9242]

Please can we also copy across the v2 changelog info for releases that have been done since August\ when we stopped syncing the branches?

It may need to be updated slightly again if we do more v2 releases, but would be good to get as much done as possible in this ticket

comments from another reviewer

The merge-base changed after approval.

[github-actions]

Cypress visual tests failed.
View the image diff here: https://github.com/mi6/ic-ui-kit/tree/gh-pages/branches/2998-update-changelogs-for-v3-release/cypress-image-diff-screenshots/diff
View the html report here: https://mi6.github.io/ic-ui-kit/branches/2998-update-changelogs-for-v3-release/cypress-image-diff-html-report/cypress-image-diff-html-report.html

[ad9242]

there still seem to be some references to earlier v3 alpha & canary releases in the files eg:

[3.0.0-canary.8] & [3.0.0-canary.9]

[3.0.0-alpha.8] & [3.0.0-alpha.9]

also there has been a new v2 release since the pr was raised, so we should merge in the changelogs from that