transpile: allow expressions in compound literals for structs

[Yeaseen]

• Fixes c2rust fails to handle increment or decrement operations within compound literals #1165.
• Fixes c2rust Transpilation failure with Struct Initialization Using Expressions #1171.

Modification:

• Suggested changes mentioned in c2rust fails to handle increment or decrement operations within compound literals #1165 were added in the c2rust-transpile/src/translator/struct.rs file.
• Added relevant C program in tests/structs/src/struct_with_exp.c
• Added relevant test code in tests/structs/src/test_struct_with_exp.rs

This test ensures that expressions, such as j++, are correctly evaluated during struct initialization using compound literals. The test has been integrated into the existing test suite and passed successfully, confirming the fix.

Please review the changes and provide feedback or approve the pull request. If further modifications are required, I am open to suggestions and will make the necessary adjustments.

[kkysen]

LGTM! Sorry, I forgot to review this a while ago.