Add version check for absolute url fix

[jacobtomlinson]

Closes #8380

In #8347 I added a workaround for a breaking change introduced in bokeh 3.3.0. It turns out it wasn't as backward compatible as I thought, so this PR puts the shim behind a version check.

[github-actions]

Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

       27 files  ±0         27 suites  ±0   12h 2m 48s ⏱️ + 22m 32s
  3 934 tests ±0    3 821 ✔️  - 1     110 💤 ±0  3 ❌ +1 
49 488 runs  ±0  47 194 ✔️  - 2  2 291 💤 +1  3 ❌ +1 

For more details on these failures, see this check.

Results for commit 91c242c. ± Comparison against base commit 6d1e133.

[fjetter]

I'm fine with the fix but am wondering if this is something we can test. we have the mindeps build for the lower versions so I would hope we can cover both cases.

[hendrikmakait]

Thanks, @jacobtomlinson for the quick turnaround.

@fjetter: I agree that it would be good to have tests for the dashboards with the minimum version of bokeh. From what I see though, mindeps does not include bokeh as it's an optional dependency. We could add another build, but that will require more work than simply adding a single test. I'd rather merge this PR to include it in the release than delay it due to missing automated tests. I've tested this manually and the fix works, so I'd propose adding tests in a follow-up PR.

[jacobtomlinson]

Yeah I agree it would be the right thing to do but didn't bother right now with a test when I spotted it wasn't included in mindeps.