ci: switch cache and longtests to default ubuntu (#4509)

I'm having some problems with CI jobs halting and these two jobs seem to be
most affected, so I'm switching them back to the default ubuntu as part of the debugging
process.

Signed-off-by: Terri Oda <[email protected]>

Author: terriko

.github/workflows/testing.yml

@@ -197,7 +197,7 @@ jobs:
           github.head_ref
         )
       )
-    runs-on: ${{ github.repository_owner == 'intel' && 'intel-ubuntu-latest' || 'ubuntu-latest' }}
+    runs-on: 'ubuntu-latest'
     timeout-minutes: 120
     env:
       LONG_TESTS: 1

.github/workflows/update-cache.yml

@@ -21,9 +21,8 @@ permissions:
 
 jobs:
   linux:
-    if: github.repository == 'intel/cve-bin-tool'
     name: Update linux cached database
-    runs-on: ${{ github.repository_owner == 'intel' && 'intel-ubuntu-latest' || 'ubuntu-latest' }}
+    runs-on: 'ubuntu-latest'
     timeout-minutes: 60
     steps:
       - name: Harden Runner