Fix typographical errors

[Pronoss]

1. IBLSSignatureChecker.sol

   • Fixed spelling of "reprensenting" to "representing" in comments.

2. IECDSAStakeRegistryEventsAndErrors.sol

   • Corrected "unregisted" to "unregistered" in error messages.

3. IntegrationDeployer.t.sol

   • Fixed typo "avsDirectoryImplemntation" to "avsDirectoryImplementation" in multiple places.

4. IndexRegistryUnit.t.sol

   • Corrected "initailizedQuorum" to "initializedQuorum" in comments and function descriptions.

5. RegistryCoordinatorUnit.t.sol

   • Fixed typo "intializers" to "initializers" in comments.