main/ninja: split bash and zsh completion

7 jobs for !712 with ninja in 2 minutes and 6 seconds (queued for 1 second)
detached
Status Job ID Name Coverage
  Lint
passed #7501
docker-alpine x86_64
lint

00:00:17

 
  Build
passed #7506
docker-alpine ci-build aarch64
build-aarch64

00:01:20

passed #7507
docker-alpine ci-build armv7
build-armv7

00:01:24

passed #7505
docker-alpine ci-build ppc64le
build-ppc64le

00:01:02

passed #7504
docker-alpine ci-build s390x
build-s390x

00:00:48

passed #7503
docker-alpine ci-build x86
build-x86

00:01:14

passed #7502
docker-alpine ci-build x86_64
build-x86_64

00:01:03