Clarify conceptual use of query filters, especially in relation to parameters

[ajcvickers]

For example, see confusion here: https://github.com/aspnet/EntityFrameworkCore/issues/12375

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Document Details

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• ID: b7c9bd3e-4b99-9acf-48d8-e47bc53eb54e
• Version Independent ID: 220e0a6c-d227-956a-d27a-7c88804f770c
• Content: Global Query Filters - EF Core
• Content Source: entity-framework/core/querying/filters.md
• Product: entity-framework
• GitHub Login: @anpete
• Microsoft Alias: anpete