Refactor: Minor changes on shell script to support double quotes format and [ ] POSIX (#3889)

* refactors sync sh

Signed-off-by: afzal442 <afzal442@gmail.com>

* fixes POSIX sh, as [[ ]] is undefined.

Signed-off-by: afzal442 <afzal442@gmail.com>

entrypoint.sh

@@ -1,10 +1,10 @@
 #!/bin/sh
 
-if [[ "${1#-}" != "$1" ]]; then
+if [ "${1#-}" != "$1" ]; then
     set -- manager "$@"
 fi
 
-if [[ "$1" = "apiserver" ]]; then
+if [ "$1" = "apiserver" ]; then
     shift # "apiserver"
     set -- apiserver "$@"
 fi

hack/apis/sync.sh

@@ -75,7 +75,7 @@ then
 else
   git add .
   git commit -m "align with kubevela-$VERSION from commit $COMMIT_ID"
-  git tag $VERSION
+  git tag "$VERSION"
   git push origin main
-  git push origin $VERSION
+  git push origin "$VERSION"
 fi