chore: bulk add stubs dir for ga clients (#6915)

Changes:

feat(accessapproval): start generating stubs dir

feat(accesscontextmanager): start generating stubs dir

feat(apigateway): start generating stubs dir

feat(apigeeconnect): start generating stubs dir

feat(appengine): start generating stubs dir

feat(artifactregistry): start generating stubs dir

feat(asset): start generating stubs dir

feat(assuredworkloads): start generating stubs dir

feat(automl): start generating stubs dir

feat(baremetalsolution): start generating stubs dir

feat(batch): start generating stubs dir

feat(beyondcorp): start generating stubs dir

feat(billing): start generating stubs dir

feat(binaryauthorization): start generating stubs dir

feat(certificatemanager): start generating stubs dir

feat(channel): start generating stubs dir

feat(cloudbuild): start generating stubs dir

feat(clouddms): start generating stubs dir

feat(cloudtasks): start generating stubs dir

feat(contactcenterinsights): start generating stubs dir

feat(container): start generating stubs dir

feat(datacatalog): start generating stubs dir

feat(datafusion): start generating stubs dir

feat(dataplex): start generating stubs dir

feat(dataproc): start generating stubs dir

feat(datastream): start generating stubs dir

feat(debugger): start generating stubs dir

feat(deploy): start generating stubs dir

feat(dialogflow): start generating stubs dir

feat(dlp): start generating stubs dir

feat(documentai): start generating stubs dir

feat(essentialcontacts): start generating stubs dir

feat(eventarc): start generating stubs dir

feat(filestore): start generating stubs dir

feat(functions): start generating stubs dir

feat(functions): start generating stubs dir

feat(gaming): start generating stubs dir

feat(gkebackup): start generating stubs dir

feat(gkemulticloud): start generating stubs dir

feat(gsuiteaddons): start generating stubs dir

feat(iam): start generating stubs dir

feat(iap): start generating stubs dir

feat(ids): start generating stubs dir

feat(iot): start generating stubs dir

feat(kms): start generating stubs dir

feat(language): start generating stubs dir

feat(longrunning): start generating stubs dir

feat(managedidentities): start generating stubs dir

feat(memcache): start generating stubs dir

feat(metastore): start generating stubs dir

feat(monitoring): start generating stubs dir

feat(networkconnectivity): start generating stubs dir

feat(networkmanagement): start generating stubs dir

feat(notebooks): start generating stubs dir

feat(optimization): start generating stubs dir

feat(orchestration): start generating stubs dir

feat(orgpolicy): start generating stubs dir

feat(osconfig): start generating stubs dir

feat(oslogin): start generating stubs dir

feat(policytroubleshooter): start generating stubs dir

feat(recaptchaenterprise/v2): start generating stubs dir

feat(recommender): start generating stubs dir

feat(redis): start generating stubs dir

feat(resourcemanager): start generating stubs dir

feat(resourcesettings): start generating stubs dir

feat(retail): start generating stubs dir

feat(run): start generating stubs dir

feat(scheduler): start generating stubs dir

feat(secretmanager): start generating stubs dir

feat(security): start generating stubs dir

feat(securitycenter): start generating stubs dir

feat(servicecontrol): start generating stubs dir

feat(servicedirectory): start generating stubs dir

feat(servicemanagement): start generating stubs dir

feat(serviceusage): start generating stubs dir

feat(shell): start generating stubs dir

feat(speech): start generating stubs dir

feat(storagetransfer): start generating stubs dir

feat(talent): start generating stubs dir

feat(texttospeech): start generating stubs dir

feat(tpu): start generating stubs dir

feat(trace): start generating stubs dir

feat(translate): start generating stubs dir

feat(video): start generating stubs dir

feat(videointelligence): start generating stubs dir

feat(vision/v2): start generating stubs dir

feat(vmmigration): start generating stubs dir

feat(vpcaccess): start generating stubs dir

feat(webrisk): start generating stubs dir

feat(websecurityscanner): start generating stubs dir

feat(workflows): start generating stubs dir