Add explicit timeout to test step

If we die from timeout of the whole GH action run, we don't run the
collect step afterward, which can make it hard to investigate the
timeout.

If we timeout first in the test action, though, it qualifies as
failure, and collects appropriately.

(330 minutes seems like an acceptable tradeoff between the 6h
timeout by default on the action and the 4h and change "functional"
usually takes.)

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes #12999

.github/workflows/zfs-tests-functional.yml

@@ -64,6 +64,7 @@ jobs:
     - name: Tests
       run: |
         /usr/share/zfs/zfs-tests.sh -vR -s 3G
+      timeout-minutes: 330
     - name: Prepare artifacts
       if: failure()
       run: |

.github/workflows/zfs-tests-sanity.yml

@@ -60,6 +60,7 @@ jobs:
     - name: Tests
       run: |
         /usr/share/zfs/zfs-tests.sh -vR -s 3G -r sanity
+      timeout-minutes: 330
     - name: Prepare artifacts
       if: failure()
       run: |