fix(mssql): change to uppercase on the described table

[arnaud-moncel]

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• Does npm run test or npm run test-DIALECT pass with this change (including linting)?
• Does the description below contain a link to an existing issue (Closes #[issue]) or a description of the issue you are solving?
• Have you added new tests to prevent regressions?
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Description of change

Fix an error on the described table for mssql with a case sensitive collation.

This PR backports #12212 to v5.

[arnaud-moncel]

The tests fail with MariaDd dialect 🤕, I didn't change anything on that.

[sushantdhiman]

🎉 This PR is included in version 5.21.9 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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