feat(user feedback): update default title for tickets created from user feedback

[jas-kas]

This PR outlines a plan to enhance the default title for tickets created from Sentry's User Feedback.

Why: The current default title "User Feedback" is generic and lacks context when integrated with external systems like JIRA, GitHub, or Linear.
What: The goal is to update the default title to be more descriptive, following the format "User Feedback:

[codecov]

❌ 2 Tests Failed:

Tests completed	Failed	Passed	Skipped
27182	2	27180	251

View the top 2 failed test(s) by shortest run time

tests.sentry.feedback.usecases.test_create_feedback::test_generate_feedback_title

Stack Traces | 0.069s run time

#x1B[1m#x1B[.../feedback/usecases/test_create_feedback.py#x1B[0m:1163: in test_generate_feedback_title
    assert generate_feedback_title(long_message) == expected
#x1B[1m#x1B[31mE   AssertionError: assert 'User Feedbac...at goes on...' == 'User Feedbac...oes on and...'#x1B[0m
#x1B[1m#x1B[31mE     #x1B[0m
#x1B[1m#x1B[31mE     Skipping 54 identical leading characters in diff, use -v to show#x1B[0m
#x1B[1m#x1B[31mE     - at goes on and...#x1B[0m
#x1B[1m#x1B[31mE     ?           ----#x1B[0m
#x1B[1m#x1B[31mE     + at goes on...#x1B[0m

tests.sentry.feedback.usecases.test_create_feedback::test_create_feedback_issue_title_with_long_message

Stack Traces | 2.47s run time

#x1B[1m#x1B[.../feedback/usecases/test_create_feedback.py#x1B[0m:1242: in test_create_feedback_issue_title_with_long_message
    assert occurrence.issue_title == expected_title
#x1B[1m#x1B[31mE   AssertionError: assert 'User Feedbac...s multiple...' == 'User Feedbac...ple issues...'#x1B[0m
#x1B[1m#x1B[31mE     #x1B[0m
#x1B[1m#x1B[31mE     Skipping 65 identical leading characters in diff, use -v to show#x1B[0m
#x1B[1m#x1B[31mE     - s multiple issues...#x1B[0m
#x1B[1m#x1B[31mE     ?           -------#x1B[0m
#x1B[1m#x1B[31mE     + s multiple...#x1B[0m

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