fix(core-api): vulnerability GHSA-mc8h-8q98-g5hr

    Primary Changes
    ---------------
    1. Updated tonic-build crate to 0.13 in cargo.toml

    Changes done to incorporate 1)
    ------------------------------
    2. Updated the tls to transport feature available in the
       latest tonic version (0.13)
    3. Refactored build.rs for the new code changes
    4. Ran cargo clean and then cargo build after deleting the
       generated rust files for the protbuf

Fixes #3873

Signed-off-by: jagpreetsinghsasan <jagpreet.singh.sasan@accenture.com>

Author: jagpreetsinghsasan