🐛 Bug: Using missingProperties with private class properties broken

[rubiesonthesky]

Bug Report Checklist

• I have tried restarting my IDE and the issue persists.
• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Expected

	class WaveTracker {
		#previouslySeen = new Set<string>();

		#repeatedCount = 0;

		addAndCheck() {
			this.#repeatedCount = 0;
		}
	}

or

	class WaveTracker {
		#previouslySeen = new Set<string>();

		#repeatedCount: number = 0;

		addAndCheck() {
			this.#repeatedCount = 0;
		}
	}

Actual

class WaveTracker {
		#previouslySeen = new Set<string>();

		#repeatedCount = 0;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;

		addAndCheck() {
			this.#repeatedCount = 0;
		}
	}

Additional Info

This can be reproduced by adding below code to missingPropertyAccess test.

class WaveTracker {
		#previouslySeen = new Set<string>();

		#repeatedCount = 0;

		addAndCheck() {
			this.#repeatedCount = 0;
		}
	}

[rubiesonthesky]

By adding new check to getMissingPropertyMutations, this can be fixed. Though I'm unsure if the fix would be correct

export const getMissingPropertyMutations = (
	request: FileMutationsRequest,
	node: ts.PropertyAccessExpression,
): Mutation | undefined => {
   // ...
   if (ts.isPrivateIdentifier(node.name)) {
       return undefined;
    }
    //...
}

[JoshuaKGoldberg]

Can't hurt to try it out 😄