Adding obfuscation processor component

[moh-osman3]

This PR:

• adds Lightstep's generatorreceiver to create synthetic telemetry in a collector pipeline
• adds obfuscation processor that will obfuscate all attributes with string values when recording telemetry

Simple Test

$ cd collector/cmd/otelarrowcol
$ go run . --config ./config/simple-record.yaml

This writes zstd compressed and obfuscated traces to an output file (e.g cmd/otelarrowcol/recorded_traces.json)

This can be replayed by running

$ cd collector/cmd/otelarrowcol
$ go run . --config ./config/simple-replay.yaml

This reads the data in the recorded file and rewrites it in an uncompressed form

You can also read in the compressed file recorded_traces.json with the the benchmark tools e.g.

$ go run ./tools/trace_benchmark --format json collector/cmd/otelarrowcol/recorded_traces.json

(cc @jmacd @lquerel)

[jmacd]

I will check this branch out and try it. I'd like the example configs to move into the examples/ directory, for one thing -- @moh-osman3 is out of town this week and I will carry this forward.

[jmacd]

Replaced by #191