Move aggregated deploy manifests to deploy folder

[tnozicka]

Description of your changes:
Aggregating all deploy manifests allows users to do kubectl apply --server-side -f https://github.com/scylladb/scylla-operator/raw/master/deploy/operator.yaml that complements the local kubectl apply --server-side -f deploy/operator/

Moving the aggregated manifests to deploy folder ensures they can be found and referenced in out install scenarios.

This also add an aggregated version of dev setup for manager.

Resolves #1533

[zimnx]

We already have these in the repo at examples/common/operator.yaml and examples/common/manager.yaml (only -prod variant) autogenerated by:

scylla-operator/Makefile

Line 483 in bda16e4

$(call concat-manifests,$(sort $(wildcard deploy/operator/*.yaml)),examples/common/operator.yaml)

and

scylla-operator/Makefile

Line 493 in bda16e4

$(call concat-manifests,$(sort $(wildcard deploy/manager/prod/*.yaml)),examples/common/manager.yaml)

[tnozicka]

good catch, I forgot about those two. I'll move them to the deploy folder (+add the dev variant) and update the docs links

[tnozicka]

verify flaked on #1546
e2e-gke-parralel on #1478
/retest

[zimnx]

/lgtm

[scylla-operator-bot]

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[tnozicka]

#1433
/retest