Standardize search query descriptions

What does this MR do?

Attempts to replicate my work in !33794 (merged) to standardize a few more search-related fields. I have the GDK running locally now, which makes attempting to do this work significantly less frustrating. The issue called for editing three files, but I only see arguments to edit on two of them:

• app/graphql/resolvers/alert_management/alert_resolver.rb
• app/graphql/resolvers/alert_management/alert_status_counts_resolver.rb
• app/graphql/resolvers/project_members_resolver.rb (I didn't see anything to edit here)

Related issues

Closes #224130 (closed)

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