Add support to import award emojis for missing entities

What does this MR do?

This MR adds support to import award emojis for the following entities:

1. Issue
2. Issue comments
3. MR
4. MR comments
5. Snippet comments

Relevant screenshots of award emoji in imported project:

1. Issue and issue note

2. MR and MR note

3. Snippet note

Mentions #36035 (closed)

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team