reporting all the validation errors in the template

Signed-off-by: Horiodino <[email protected]>

updatec test-cases

Signed-off-by: Horiodino <[email protected]>

using err.join

Signed-off-by: Horiodino <[email protected]>

added suggested changes

Signed-off-by: Horiodino <[email protected]>

fixed linter errs

Signed-off-by: Horiodino <[email protected]>

Author: Horiodino