COMPASS-11000: align query and aggregation toolbar icons

[mongodb-sage-bot]

Description

Applies the visual icon consistency changes for queries and aggregations:

• Docs tab query history button now uses the query (CurlyBraces) icon
  instead of the recent (Clock) icon.
• Aggregation saved pipelines button now uses the query (CurlyBraces)
  icon instead of the folder (Folder) icon.
• Removed the star (Favorite) icon from the Save button in the bulk
  Update modal.
• Removed the save (Save) icon from the aggregation Save / Save as
  dropdown button.

Unused Icon imports left behind by the two removals were dropped, and
tests were added to cover each changed button.

Checklist

• New tests and/or benchmarks are included
• Documentation is changed or added
• If this change updates the UI, screenshots/videos are added and a design review is requested
• If this change could impact the load on the MongoDB cluster, please describe the expected and worst case impact
• I have signed the MongoDB Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)

Motivation and Context

Part of the parent effort to make icons consistent across the queries and
aggregations experiences (COMPASS-10999). The query history and saved
pipelines entry points should share the same query icon, and the Save
actions should not carry mismatched star/save glyphs.

• Bugfix
• New feature
• Dependency update
• Misc

Types of changes

• Backport Needed
• Patch (non-breaking change which fixes an issue)
• Minor (non-breaking change which adds functionality)
• Major (fix or feature that would cause existing functionality to change)

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Important

MongoDB Contribution Guidelines

This pull request was generated by sage-bot on behalf of misba.abbas@mongodb.com (ticket assignee). The assignee must self-review the changes before requesting review from another engineer.
The assignee is not allowed to merge their own PR without approval from another engineer.

• misba.abbas@mongodb.com has read and agrees to the MongoDB AI Policy
• misba.abbas@mongodb.com has self-reviewed this PR before requesting review from another engineer

[mongodb-sage-bot]

Sage Bot can help with this pull request. Just @sage-bot in comments and I'll start working on changes in this branch.
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