An option to keep the debug information in the collector binary

[kaero]

It's hard to impossible to debug a collector binary using gdb due to stripped DWARF and symbols tables.
https://github.com/open-telemetry/opentelemetry-collector/blob/main/cmd/builder/internal/builder/main.go#L89

It would be wonderful to have an option in the builder configuration to keep the debug information. Possibly it could be generalized to a pass of any arguments to the go build command call with the default value ["-ldflags=-s -w", "-trimpath"] to keep the compatibility.

[jpkrohling]

Duplicates #58.