Update documentation for v1.18 release

[turkenh]

• Update the $LATEST_VER parameter in netlify_build.sh
• Update params.latest in config.yaml
• Update version in the _index.md file of /content/<new latest> from master to the correct version.
• Copy Crossplane cluster/crds contents to /content/<new latest>/api/crds.
• Create a new release/tag named "v-archive" to snapshot EOL'd docs.
• Remove EOL'd docs version from "/content" directory and run hugo locally to check for broken links.
• Trigger Algolia Crawler after publishing to reindex results.

Fixes #826

[netlify]

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Lighthouse	1 paths audited Performance: 69 (🔴 down 15 from production) Accessibility: 90 (🔴 down 2 from production) Best Practices: 83 (no change from production) SEO: 100 (no change from production) PWA: 70 (no change from production) View the detailed breakdown and full score reports

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[jbw976]

LGTM @turkenh!

i took the preview site for a test drive too and new v1.18 content appears to be there correctly with no obvious/clear regressions.