test(pkg/utils): Check errors generically for NewGrpc test

[ksubrmnn]

Description:
Check if an error occurs in NewGrpc tests instead of checking contents of errors. This will handle various types of errors that may occur due to different runtime environments.

Affected area:

• New Functionality [ ]
• Documentation [ ]
• Install [ ]
• Control Plane [ ]
• CLI Tool [ ]
• Certificate Management [ ]
• Networking [ ]
• Metrics [ ]
• SMI Policy [ ]
• Security [ ]
• Tests [X]
• CI System [ ]
• Performance [ ]
• Other [ ]

Please answer the following questions with yes/no.

• Does this change contain code from or inspired by another project? If so, did you notify the maintainers and provide attribution?

No