Update KEP-3329 "Retriable and non-retriable Pod failures for Jobs" (#3438)

* Update the docs based on the changes during implementation of Alpha

Update keps/sig-apps/3329-retriable-and-non-retriable-failures/README.md

Co-authored-by: Maciej Szulik <soltysh@gmail.com>

Update keps/sig-apps/3329-retriable-and-non-retriable-failures/README.md

Co-authored-by: Maciej Szulik <soltysh@gmail.com>

Update keps/sig-apps/3329-retriable-and-non-retriable-failures/README.md

Co-authored-by: Maciej Szulik <soltysh@gmail.com>

Update keps/sig-apps/3329-retriable-and-non-retriable-failures/README.md

Co-authored-by: Maciej Szulik <soltysh@gmail.com>

Update keps/sig-apps/3329-retriable-and-non-retriable-failures/README.md

Co-authored-by: Maciej Szulik <soltysh@gmail.com>

Update keps/sig-apps/3329-retriable-and-non-retriable-failures/README.md

Co-authored-by: Maciej Szulik <soltysh@gmail.com>

Update keps/sig-apps/3329-retriable-and-non-retriable-failures/README.md

Co-authored-by: Maciej Szulik <soltysh@gmail.com>

Update keps/sig-apps/3329-retriable-and-non-retriable-failures/README.md

Co-authored-by: Maciej Szulik <soltysh@gmail.com>

Update keps/sig-apps/3329-retriable-and-non-retriable-failures/README.md

Co-authored-by: Maciej Szulik <soltysh@gmail.com>

Update keps/sig-apps/3329-retriable-and-non-retriable-failures/README.md

Co-authored-by: Maciej Szulik <soltysh@gmail.com>

* Cleanup the API comments

* Note about attempting to use SSA

* Rename the pod condition

* Introduce Count action

* Remarks

Co-authored-by: Maciej Szulik <soltysh@gmail.com>

Author: mimowo