fix bcrypt api misuse caused memory leak

[normanade]

Issue #2918 , if available: S3Client Leaks Memory on Windows caused by BCrypt API Misuse

Description of changes: fix bcrypt api misuse by deconstructing member variables without ommision

Check all that applies:

• [x] Did a review by yourself.
• [ ] Added proper tests to cover this PR. (If tests are not applicable, explain: memory leaks is not easily detected by test code)
• [ ] Checked if this PR is a breaking (APIs have been changed) change.
• [x] Checked if this PR will not introduce cross-platform inconsistent behavior.
• [ ] Checked if this PR would require a ReadMe/Wiki update.

Check which platforms you have built SDK on to verify the correctness of this PR.

• [ ] Linux
• [x] Windows
• [ ] Android
• [ ] MacOS
• [ ] IOS
• [ ] Other Platforms

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[normanade]

double checked, existing typos has been fixed by now, request merge again