[rocm-libraries] ROCm/rocm-libraries#7612 (commit 5427d24)

[CK] upgrade CI to rocm7.13 as default compiler (#7612)

## Motivation

Upgrade the default docker and compiler version in CI to rocm7.13.
In order to pass all the checks I had to also clean up a lot of
non-ascii characters in the source code comments and modify a couple of
tests that were affected by a new compiler logic.

## Technical Details

<!-- Explain the changes along with any relevant GitHub links. -->

## Test Plan

<!-- Explain any relevant testing done to verify this PR. -->

## Test Result

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## Submission Checklist

- [ ] Look over the contributing guidelines at
https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

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Co-authored-by: Aviral Goel <aviral.goel@amd.com>

experimental/builder/test/testing_utils.cpp

@@ -21,7 +21,7 @@ namespace ck_tile::test {
 // Wagner-Fischer Algorithm for Computing Edit Distance and Inline Diff
 //
 // OUTPUT FORMAT: [expected|actual] for differences, plain text for matches
-// Example: "hello world" vs "hello earth" → "hello [world|earth]"
+// Example: "hello world" vs "hello earth" -> "hello [world|earth]"
 //
 // This function implements the Wagner-Fischer algorithm (1974), which is the classic
 // dynamic programming solution for computing the minimum edit distance (Levenshtein distance)