Remove outdated Renarde references in OIDC and web guides

[bhawnapannu2701]

Summary

Removed outdated references to Renarde in OIDC providers and web guides.

Why

These references are no longer relevant and caused confusion for readers.

Verification

Built docs locally; checked that links and sections render correctly.

[github-actions]

🙈 The PR is closed and the preview is expired.

[geoand]

Thanks for the contribution!

Please squash the commits when done

[bhawnapannu2701]

“Hi, I’ve checked — the commits are already squashed into a single one after applying the suggestion. Please let me know if any further change is needed"

[geoand]

begs to differ :)

[geoand]

Thanks for the update!

[sberyozkin]

Thanks @bhawnapannu2701 for reverting the merge from main, if you'd like, we can help with squashing ?

Like I said, just do

git log --abbrev-commit
git rebase -i <commit-before-your-commit>

where commit-before-your-commit is one preceeding your ae7e892824f36cf98de0d1824105fde5efe1c1c8.

and this will show 2 commits with pick, your one and the one related to the suggestion I made, and you replace pick with f for this suggestion's commit.

So, say, in vi, you'll see:

pick ae7e892 ...
pick 23f1d3e ...

and you update it like this:

pick ae7e892 ...
f 23f1d3e ...

and save and it is done...

Give it a try and if it does not work, we can squash

[bhawnapannu2701]

Squash done. Branch rebased on main. Ready for review ✅

[quarkus-bot]

Status for workflow Quarkus Documentation CI

This is the status report for running Quarkus Documentation CI on commit f5dca62.

✅ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.

[sberyozkin]

Great PR, thanks @bhawnapannu2701