Fix lightweight delete after drop of projection

[CurtizJ]

Changelog category (leave one):

• Bug Fix (user-visible misbehavior in an official stable release)

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

Fix lightweight deletes after drop of projection. Lightweight deletes do not work in presence of projection but previously they could fail even after drop of projection.

[robot-clickhouse-ci-1]

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[CurtizJ]

I also found that this sequence of queries fail on materialization of projection in an obscure way, but let's fix it in a separate PR:

SET mutations_sync = 2;

CREATE TABLE t_projections_lwd (a UInt32, b UInt32, PROJECTION p ()) ENGINE = MergeTree;

INSERT INTO t_projections_lwd SELECT number, number FROM numbers(100);

-- LWD works
DELETE FROM t_projections_lwd WHERE a = 0;

-- add projection
ALTER TABLE t_projections_lwd ADD PROJECTION p_t_projections_lwd ();
ALTER TABLE t_projections_lwd MATERIALIZE PROJECTION p_t_projections_lwd;