fix: variadic methods build errors

[muskanlalit18]

Issue #, if available:

Description of changes:
[Opensource Ubuntu mode]

1. Remove all invocations of variadic methods using variadic params
2. Fix the logger function that used the variadic param to use a const char*
3. Remove the usage of format string from logging
4. Update logger method invokes to create C++ style string and pass as a param directly to the logger method

Testing done:

Merge Checklist

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General

• I have read the CONTRIBUTING doc
• I used the commit message format described in CONTRIBUTING
• I have updated any necessary documentation, including READMEs and comments (where appropriate)

Tests

1. Logs viewed on the console:

Credentials-fetcher daemon has started running
on request failures check logs located at /var/credentials-fetcher/logging
krb_files_dir = /var/credentials-fetcher/krbdir
logging_dir = /var/credentials-fetcher/logging
unix_socket_dir = /var/credentials-fetcher/socket
Thread 0: top of stack near 0x7f6cb51ffbe0; argv_string=grpc_thread
Thread 0: top of stack near 0x7f6cafb7fb28; argv_string=krb_ticket_refresh_thread
2024-11-20 19:24:51     INFO: Server listening on unix:/var/credentials-fetcher/socket/credentials_fetcher.sock
2024-11-20 19:24:51     INFO: CallDataCreateKerberosLease 0x7f6cb000d770status: 0
2024-11-20 19:24:51     INFO: AddNonDomainJoinedKerberosLease 0x7f6cb000e1a0status: 0
2024-11-20 19:24:51     INFO: RenewNonDomainJoinedKerberosLease 0x7f6cb000ebe0status: 0
2024-11-20 19:24:51     INFO: CallDataDeleteKerberosLease 0x7f6cb000f600status: 0
2024-11-20 19:24:51     INFO: CallDataHealthCheck 0x7f6cb0010090 status: 0

2. Logs in /var/logging/credentials-fetcher.log

2024-11-20 19:24:51: Credentials-fetcher daemon has started running 
2024-11-20 19:24:51: grpc pthread is at 0x58816b1a21f0 
2024-11-20 19:24:51: krb refresh pthread is at 0x58816b1a22a0 

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[bhallasaksham]

Remove line 133 and 134

[bhallasaksham]

good to remove @smhmhmd?

[smhmhmd]

The std:cerr can be added to write_log as well, also, those prints can be brought back.

[muskanlalit18]

Shall I add all of these cerr logs to write_log?

[smhmhmd]

Please go ahead

[bhallasaksham]

Added two minor comments to remove commented out code, but otherwise LGTM