Always act as if contacts are prohibited

[gbrodman]

This PR finds instances where we previously checked if the feature flag for contacts-prohibited was set and removes those checks, making the contacts-prohibited behavior the only behavior. Because the tests didn't have that feature flag set, this means we need to change a ton of tests to remove contact references.

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This change is 

[weiminyu]

@weiminyu reviewed 180 of 180 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @gbrodman)

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core/src/main/java/google/registry/batch/RemoveAllDomainContactsAction.java line 112 at r1 (raw file):

        tm().transact(() -> FeatureFlag.isActiveNow(MINIMUM_DATASET_CONTACTS_PROHIBITED)),
        "Minimum dataset migration must be completed prior to running this action");
    response.setContentType(PLAIN_TEXT_UTF_8);

Should this line remain?

Code quote:

response.setContentType(PLAIN_TEXT_UTF_8);

[gbrodman]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @weiminyu)

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core/src/main/java/google/registry/batch/RemoveAllDomainContactsAction.java line 112 at r1 (raw file):

Previously, weiminyu (Weimin Yu) wrote…

Should this line remain?

yeah probably, though this entire action is deleted in #2872