The call to `i18n.LoadTranslations` needs to occur on init so
that package-level variables that call `i18n.T()` to initialize
their values will be able to receive the translated string.
Added new integration tests to test help output translation.
Go 1.16's embed directive doesn't allow embeding files from parent
directories. Hence, moving the translations data to inside the i18n package.
Logically speaking as well, kubectl related artifacts should be inside
the kubectl package.
Signed-off-by: Nabarun Pal <pal.nabarun95@gmail.com>
