Update pattern rewrite tutorial's code listing to use matchAndRewrite

[paul0403]

Context:
In the latest llvm update, the individual match and rewrite methods were removed.
We update pattern rewrite tutorial's code listing to use matchAndRewrite.

Benefits:
Code listing on tutorial is correct.

[github-actions]

Hello. You may have forgotten to update the changelog!
Please edit doc/releases/changelog-dev.md on your branch with:

• A one-to-two sentence description of the change. You may include a small working example for new features.
• A link back to this PR.
• Your name (or GitHub username) in the contributors section.

[paul0403]

@dime10 Please delete the branch docs/merge-unitary-gates-pass, that one has the old individual match and rewrite methods.

Also please delete the branches docs/pattern-rewrite-merge-unitary-tutorial and docs/pattern-rewrite-pass-tutorial. These are just me messing something up :)))))) 😅 😅 😿

The only branch that is supposed to exist is the docs/pattern-rewrite (which I update the documentation to point to)

[dime10]

@dime10 Please delete the branch docs/merge-unitary-gates-pass, that one has the old individual match and rewrite methods.

Also please delete the branches docs/pattern-rewrite-merge-unitary-tutorial and docs/pattern-rewrite-pass-tutorial. These are just me messing something up :)))))) 😅 😅 😿

The only branch that is supposed to exist is the docs/pattern-rewrite (which I update the documentation to point to)

This PR doesn't update references to those branches, have they already been updated where appropriate?

[paul0403]

This PR doesn't update references to those branches, have they already been updated where appropriate?

Yes, this link is updated:

---    in this section: https://github.com/PennyLaneAI/catalyst/commit/9afcc3500e12e5a51b78dda76cd4d27bdf4c8905
+++    in this section: https://github.com/PennyLaneAI/catalyst/commit/2c84b2402cb67c62a6de5137bbf5b41afaa5a328

This is the full code we link to for the merge-chained-unitary-gates pass we use as an example in the pattern rewrite tutorial: https://docs.pennylane.ai/projects/catalyst/en/stable/dev/transforms.html#invoking-transformation-patterns:~:text=point%20is%20reached.-,Note,described%20in%20this%20section%3A%20https%3A//github.com/PennyLaneAI/catalyst/commit/9afcc3500e12e5a51b78dda76cd4d27bdf4c8905,-Writing%20more%20general

Currently this link points to the commit on branch docs/merge-unitary-gates-pass. However the code there will no longer work due to mlir removing the individual match and rewrite in the last update.

The new link points to the docs/pattern-rewrite branch, which I have updated to use the matchAndRewrite.

The branches docs/pattern-rewrite-merge-unitary-tutorial and docs/pattern-rewrite-pass-tutorial are just my mistakes and can be deleted, they are not used anywhere.

[dime10]

Thanks Paul!

[dime10]

Currently this link points to the commit on branch docs/merge-unitary-gates-pass. However the code there will no longer work due to mlir removing the individual match and rewrite in the last update.

I'm going to leave this branch until the new version is available as "stable" in the docs (i.e. next release).

I deleted the other ones though.