feat(perf): add cache for authtoken lookup

[Altahrim]

• Resolves: Cache authtoken lookup by token #42823

Summary

Add cache for authtoken lookup

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[ChristophWurst]

Tested & works

Blackfire confirms that 2 requests are shaved off most requests.
Loading my dev env dashboard causes 18 auth token SELECTs on master and 1 here.

🚀

[solracsf]

Any chance this could be backported?

[Altahrim]

/backport to stable28

[Altahrim]

/backport to stable27

[Altahrim]

/backport to stable26

[backportbot]

The backport to stable26 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable26
git pull origin stable26

# Create the new backport branch
git checkout -b backport/43057/stable26

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick d1189f92

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/43057/stable26

Error: Failed to push branch backport/43057/stable26: fatal: could not read Username for 'https://github.com': No such device or address

---

Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.