Upgrade EUI to v81.3.0

[cee-chen]

Summary

eui@81.2.0 ⏩ eui@81.3.0

✨ Highlights:

• fixes EuiCodeBlock - Copy Paste Experience broken as clicking on Copy Icon also copies Line Numbers #158644
• Adds a new Timeline icon for use within EuiMarkdownEditor (cc @kqualters-elastic)
• Expandable rows used within EuiBasicTable and EuiInMemoryTable now have a faster and snappier expand animation

---

81.3.0

• Added timelineWithArrow glyph to EuiIcon (#6822)

Bug fixes

• Fixed EuiCodeBlock potentially incorrectly ignoring lines ending with a question mark when using the Copy button. (#6794)
• Fixed EuiCodeBlock to not include line numbers when copying content (#6824)
• Fixed the expanded row animation on EuiBasicTable causing cross-browser Safari issues (#6826)

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 357db37

Metrics [docs]

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
kbnUiSharedDeps-css	312.5KB	312.5KB	+1.0B
kbnUiSharedDeps-npmDll	6.0MB	6.0MB	+437.0B
total			+438.0B

Unknown metric groups

ESLint disabled line counts

id	before	after	diff
enterpriseSearch	19	21	+2
securitySolution	413	417	+4
total			+6

Total ESLint disabled count

id	before	after	diff
enterpriseSearch	20	22	+2
securitySolution	497	501	+4
total			+6

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[elasticmachine]

Pinging @elastic/eui-team (EUI)