Add pref_label & alt_label to ilike search fields for ETypeClass and MTypeClass

[eleftherioszisis]

Requested in: openbraininstitute/core-web-app#1115 (comment)

[eleftherioszisis]

@jdcourcol changes are merged but staging is frozen. Do we need a new version deployed now or should we wait?

[jdcourcol]

we wait. Hopefully, that should not be long.

[eleftherioszisis]

Changes deployed to staging.