Fix/ignore views for list collections

[ramunas-omnisend]

When listCollections is executed, it may encounter views, which can cause errors such as:

ERRO[0016] cannot get $collstats cursor for collection <database>.<view>: (CommandNotSupportedOnView) Namespace <database>.<collection> is a view, not a collection

This fix filters out views when listing collections, preventing these errors from appearing in the logs.

[it-percona-cla]

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1 out of 3 committers have signed the CLA.

:white_check_mark: ramunas-omnisend
:x: zygis
:x: ritmas
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[ramunas-omnisend]

will open another PR