Upgrade ts emitter version to v0.18.0 (Azure#27626)

Upgrade emitter-package and emitter-package-lock

Author: MaryGao

.scripts/automation_generate.sh

@@ -2,4 +2,4 @@
 export NVM_DIR="$HOME/.nvm"
 [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm
 nvm use default
-code-gen-pipeline --inputJsonPath=$1 --outputJsonPath=$2 --use=@autorest/typescript@^6.0.11 --typespecEmitter=@azure-tools/typespec-ts
+code-gen-pipeline --inputJsonPath=$1 --outputJsonPath=$2 --use=@autorest/typescript@^6.0.12 --typespecEmitter=@azure-tools/typespec-ts