Move coverity back to ubuntu 22 until test failures are fixed (#1504)

The issues in #1453 seem to
have only shown up since we moved to ubuntu 24, as part of the rolling
`ubunut-latest` migration from 22->24.

Closes #1453.

Signed-off-by: Madelyn Olson <[email protected]>

Author: madolson

.github/workflows/coverity.yml

@@ -17,7 +17,7 @@ permissions:
 jobs:
   coverity:
     if: github.repository == 'valkey-io/valkey'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - name: Download and extract the Coverity Build Tool