Change location-based replacement to use Go template

[sunya-ch]

This PR includes multiple updates.

A big update is to use Go Template instead of location-based replacement regarding issue #13.

Check ./controllers changes.

For the rest updates are as follows:

• change old version of location-based benchmark to template benchmark examples and rename folder from benchmarks to examples
• update test code and move all code to be under cpe_test with cpe_test/sample examples of benchmarks for testing.
• update manifest config and Makefile to get rid of complicated deployment
• update README document
• add GitHub actions for unittest and build pipeline related to issue pipeline to build docker image and buildx to support x86, arm64 and s390x #14.
• remove requirement of tunedHandler

Signed-off-by: Sunyanan Choochotkaew sunyanan.choochotkaew1@ibm.com