Update Makefile to support running specific unit and e2e tests (#1230)

[nitishmalang]

updated the Makefile to allow running specific unit and e2e tests based on a test pattern. This helps reduce testing time by allowing run only the relevant tests for their changes.

Changes:

• Added UNIT_TEST_PATTERN and E2E_TEST_PATTERN variables to filter tests.
• Added test-unit-specific and test-e2e-specific targets to run specific tests.
• Updated test-unit and test-e2e targets to support test filtering.

Usage Examples:

• Run specific unit tests: make test-unit-specific UNIT_TEST_PATTERN="TestServices"
• Run specific e2e tests: make test-e2e-specific E2E_TEST_PATTERN="TestServices"
• Run all tests: make test

Fixes #1230.

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