[chore] Ability to provide custom ld and gc flags

[Dainerx]

Description

The primary purpose of this PR is to provide greater flexibility in how OTEL binaries are built, enabling the inclusion of debugging symbols when needed, without always stripping them by default.

Currently, debugging symbols are only retained when debug_compilation=true. However, this approach also disables all compiler inlining and optimizations (gcflags=all=-N -l) to ensure an exact match between written and executed code, resulting in a significant increase in CPU consumption. There are scenarios where we want binaries with debugging symbols and DWARF information while still allowing the compiler to optimize and inline. This PR addresses that need by introducing configurable GCFlags.

ocb --ldflags="" --gcflags="" --config=builder-config.yaml

Link to tracking issue

Fixes #58

Testing

Manual

Override LDflags:

Override both

Documentation

README file updated.

--

Backward compatibility concerns:

• As of today, passing cfg.LDFlags will append to LD flags that are by default to -s -w.

Questions:

• Should we deprecate DebugCompilation property?