🤖 Adjust Date Range Validation

[sentry-autofix]

👋 Hi there! This PR was automatically generated 🤖

Triggered by [email protected]

Fixes SENTRY-33Q1

The issue arises from the 'get_date_range_from_stats_period' function in 'src/sentry/api/utils.py' where the start date is not strictly less than the end date, causing an 'InvalidParams' exception. To resolve this, we will adjust the validation logic to allow start and end dates to be equal, accommodating use cases where the range is intended to cover a single point in time.

The steps that were performed:

1. Modify Date Range Validation

📣 Instructions for the reviewer which is you, yes you:

• If these changes were incorrect, please close this PR and comment explaining why.
• If these changes were incomplete, please continue working on this PR then merge it.
• If you are feeling confident in my changes, please merge this PR.

This will greatly help us improve the autofix system. Thank you! 🙏

If there are any questions, please reach out to the AI/ML Team on #proj-autofix

🤓 Stats for the nerds:

Prompt tokens: 29346
Completion tokens: 937
Total tokens: 30283

[getsantry]

This pull request has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you add the label WIP, I will leave it alone unless WIP is removed ... forever!

---

"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀