[2.2] Sync dependency updates and more from develop

[westonruter]

Previously #6954.

PR includes:

• Fix phpunit tests after postcss update and changes in WP 6.0-alpha #6983
• Bump lint-staged from 12.3.5 to 12.3.6 #6982
• Bump postcss from 8.4.11 to 8.4.12 #6981
• Bump postcss from 8.4.8 to 8.4.11 #6980
• Bump eslint-plugin-react from 7.29.3 to 7.29.4 #6978
• Bump @babel/core from 7.17.5 to 7.17.7 #6977
• Bump eslint-plugin-jsdoc from 38.0.1 to 38.0.4 #6976
• Attempt to fix Dependabot auto-merge workflow #6975
• Bump eslint-plugin-jsdoc from 37.9.7 to 38.0.1 #6972
• Bump eslint from 8.10.0 to 8.11.0 #6971
• Update Gutenberg packages after v12.7.2 release #6970
• Bump axios from 0.26.0 to 0.26.1 #6969
• Bump dependabot/fetch-metadata from 1.1.1 to 1.3.0 #6966
• Update Dependabot auto-merge workflow based on latest GitHub documentation #6964
• Bump node-fetch from 2.6.5 to 2.6.7 #6963
• Bump postcss from 8.4.7 to 8.4.8 #6962
• Bump lint-staged from 12.3.4 to 12.3.5 #6961
• Bump eslint-plugin-jsdoc from 37.9.6 to 37.9.7 #6960
• Bump eslint-plugin-react from 7.29.2 to 7.29.3 #6957
• Bump postcss-preset-env from 7.4.1 to 7.4.2 #6953
• Bump actions/checkout from 2 to 3 #6951

With already cherry-picked items excluded from this query:

gh pr list --search "merged:2022-03-03T02:19:00Z..2022-03-18T10:29:18Z milestone:v2.2.2 " --limit=1000

[github-actions]

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