ci: record-if-missing when coming from stainless (#4408)

# What does this PR do?

we will typically need to record the missing json for net new APIs. use
record-if-missing so that the integration tests can re-record and commit
the files to the PR

set the stainless inference mode to record-if-missing, and properly pass
the pr_head_sha on workflow_call.

## Test Plan

see 2031824567
which uses this commit.

Signed-off-by: Charlie Doern <cdoern@redhat.com>

.github/actions/run-and-record-tests/action.yml

@@ -62,7 +62,7 @@ runs:
 
 
     - name: Commit and push recordings
-      if: ${{ inputs.inference-mode == 'record' }}
+      if: ${{ inputs.inference-mode == 'record' ||  inputs.inference-mode == 'record-if-missing' }}
       shell: bash
       run: |
         echo "Checking for recording changes"