[tsconfig.json] Revert accidental changes

[mikeharder]

• Revert changes accidentally merged in #26358

[openapi-pipeline-app[bot]]

Next Steps to Merge

✔️ All automated merging requirements have been met! Refer to step 4 in the PR workflow diagram (even if your PR is for data plane, not ARM).

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Swagger Validation Report

️️✔️BreakingChange succeeded [Detail] [Expand]

There are no breaking changes.

️️✔️Breaking Change(Cross-Version) succeeded [Detail] [Expand]

There are no breaking changes.

️️✔️CredScan succeeded [Detail] [Expand]

There is no credential detected.

️️✔️LintDiff succeeded [Detail] [Expand]

Validation passes for LintDiff.

️️✔️Avocado succeeded [Detail] [Expand]

Validation passes for Avocado.

️️✔️SwaggerAPIView succeeded [Detail] [Expand]

️️✔️TypeSpecAPIView succeeded [Detail] [Expand]

️️✔️ModelValidation succeeded [Detail] [Expand]

Validation passes for ModelValidation.

️️✔️SemanticValidation succeeded [Detail] [Expand]

Validation passes for SemanticValidation.

️️✔️PoliCheck succeeded [Detail] [Expand]

Validation passed for PoliCheck.

️️✔️SpellCheck succeeded [Detail] [Expand]

Validation passes for SpellCheck.

️️✔️Lint(RPaaS) succeeded [Detail] [Expand]

Validation passes for Lint(RPaaS).

️️✔️PR Summary succeeded [Detail] [Expand]

Validation passes for Summary.

️️✔️Automated merging requirements met succeeded [Detail] [Expand]

_{Posted by Swagger Pipeline | How to fix these errors?}

[openapi-pipeline-app[bot]]

Swagger Generation Artifacts

️️✔️ApiDocPreview succeeded [Detail] [Expand]

️️✔️SDK Breaking Change Tracking succeeded [Detail] [Expand]

Breaking Changes Tracking

_{Posted by Swagger Pipeline | How to fix these errors?}

[openapi-pipeline-app[bot]]

PR validation pipeline started successfully. If there is ApiView generated, it will be updated in this comment.