Switch to PAT generated GH token (#5027) (#5441)

* Update sync-k8s.sh

* Update creator_k8s_manifest.sh

* Update creator_k8s_manifest.sh

* Update sync-k8s.sh

* Changes made for test new PAT generated token

* For test changes

* Update Makefile

* Revert changes that was done for test

* Update creator_k8s_manifest.sh

* Update creator_k8s_manifest.sh

(cherry picked from commit 60f66df)

Co-authored-by: Yehor Shvedov <146825775+ev1yehor@users.noreply.github.com>

Author: mergify[bot]

.buildkite/scripts/steps/sync-k8s.sh

@@ -7,13 +7,10 @@ source .buildkite/scripts/install-gh.sh
 source .buildkite/scripts/common.sh
 
 echo "--- [Prepare env] Create required env variables"
-GITHUB_TOKEN_VAULT_PATH="kv/ci-shared/platform-ingest/github_token"
-GITHUB_USERNAME_SECRET=$(retry 5 vault kv get -field username ${GITHUB_TOKEN_VAULT_PATH})
-export GITHUB_USERNAME_SECRET
-GITHUB_EMAIL_SECRET=$(retry 5 vault kv get -field email ${GITHUB_TOKEN_VAULT_PATH})
-export GITHUB_EMAIL_SECRET
-GITHUB_TOKEN_SECRET=$(retry 5 vault kv get -field token ${GITHUB_TOKEN_VAULT_PATH})
-export GITHUB_TOKEN_SECRET
+GITHUB_USERNAME_SECRET="elasticmachine"
+export GITHUB_USERNAME_SECRET=$GITHUB_USERNAME_SECRET
+export GITHUB_EMAIL_SECRET="elasticmachine@elastic.co"
+export GITHUB_TOKEN_SECRET=$VAULT_GITHUB_TOKEN
 
 cd deploy/kubernetes