Create hollow_diamond_alphabets.py

[Manojkumar2806]

Add the hollow_diamond_alphabet function, which prints a hollow diamond pattern using uppercase alphabet characters based on the specified size. The parameter n determines the number of rows in the diamond. This function uses spaces for alignment and hollow spaces within the diamond structure, creating a visually appealing output.

Example: For n=5, the output will be:

Describe your change:

• [x] Add an algorithm?
• [ ] Fix a bug or typo in an existing algorithm?
• [ ] Add or change doctests? -- Note: Please avoid changing both code and tests in a single pull request.
• [ ] Documentation change?

Checklist:

• [x] I have read CONTRIBUTING.md.
• [x] This pull request is all my own work -- I have not plagiarized.
• [x] I know that pull requests will not be merged if they fail the automated tests.
• [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• [x] All new Python files are placed inside an existing directory.
• [x] All filenames are in all lowercase characters with no spaces or dashes.
• [x] All functions and variable names follow Python naming conventions.
• [x] All function parameters and return values are annotated with Python type hints.
• [x] All functions have doctests that pass the automated testing.
• [x] All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
• [x] If this pull request resolves one or more open issues then the description above includes the issue number(s) with a closing keyword: "Fixes #ISSUE-NUMBER".

[Manojkumar2806]

But it gives the output correctly. Could you please tell me why these pull request is not accepted.

[cclauss]

Closing tests_are_failing PRs to prepare for Hacktoberfest