Test with release-v0.23 of instructlab/instructlab

This updates our release-v0.7 branch to test with the corresponding
version of instructlab/instructlab, instead of main.

Signed-off-by: Ben Browning <bbrownin@redhat.com>

Author: bbrowning

.github/workflows/e2e-nvidia-l4-x1.yml

@@ -89,6 +89,7 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           repository: "instructlab/instructlab"
+          ref: "release-v0.23"
           path: "instructlab"
           # https://github.com/actions/checkout/issues/249
           fetch-depth: 0

.github/workflows/e2e-nvidia-t4-x1.yml

@@ -89,6 +89,7 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           repository: "instructlab/instructlab"
+          ref: "release-v0.23"
           path: "instructlab"
           # https://github.com/actions/checkout/issues/249
           fetch-depth: 0

.github/workflows/test.yml

@@ -47,9 +47,6 @@ jobs:
           - "3.11"
         platform:
           - "ubuntu-latest"
-        include:
-          - python: "3.11"
-            platform: "macos-latest"
     steps:
       - name: "Harden Runner"
         uses: step-security/harden-runner@cb605e52c26070c328afc4562f0b4ada7618a84e # v2.10.4