fix: specify output directory so librarian builds have access to files created (#1798)

This is to fix the issue that we weren't able to see the contents of the
output directory when created directly by librarian.

This also adds the push command to the stage-release build

Author: ldetmer

infra/prod/generate.yaml

@@ -49,6 +49,7 @@ steps:
   - name: 'us-central1-docker.pkg.dev/cloud-sdk-production-pipeline/images-prod/librarian@sha256:fd5a83ab38e775ccf7f8431f97050c12c1cad2490d5ca8f80a456e9f87fc88e1'
     id: generate
     waitFor: ['configure-language-repo-email', 'clone-googleapis']
+    dir: tmp
     args:
       - 'generate'
       - '-repo'
@@ -57,6 +58,8 @@ steps:
       - $_LIBRARY_ID
       - '-api-source'
       - '/workspace/googleapis'
+      - '-output'
+      - /workspace/tmp
       - '-push=$_PUSH'
     secretEnv: ['LIBRARIAN_GITHUB_TOKEN']
 tags: ['generate-$_REPOSITORY']

infra/prod/stage-release.yaml

@@ -35,6 +35,7 @@ steps:
   - name: 'us-central1-docker.pkg.dev/cloud-sdk-production-pipeline/images-prod/librarian@sha256:fd5a83ab38e775ccf7f8431f97050c12c1cad2490d5ca8f80a456e9f87fc88e1'
     id: stage-release
     waitFor: ['clone-language-repo', 'clone-googleapis']
+    dir: tmp
     args:
       - 'release init'
       - '-repo'
@@ -43,6 +44,9 @@ steps:
       - $_LIBRARY_ID
       - '-api-source'
       - '/workspace/googleapis'
+      - '-output'
+      - /workspace/tmp
+      - '-push=$_PUSH'
     secretEnv: ['LIBRARIAN_GITHUB_TOKEN']
 tags: ['stage-release-$_REPOSITORY']
 availableSecrets: