fix(core-select): LuCoreSelectUsersDirective extension / displayMeOption

[GuillaumeNury]

Description

• fix(core-select): apps could not extend LuCoreSelectUsersDirective anymore
• fix(core-select): displayMeOption was not working anymore

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Optionally, technical or more in-depth description for reviewers. Keep an empty line under your text, as well as the 5 lines that follow it.

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[LuccaIntegration]

:woman_cook: https://lucca-front.lucca.tech/PR-3194/storybook