chore(datadog-tracer-flare): remove unnecessary features/deps (#1761)

# What does this PR do?

Only included the necessary compression features used by the crate.

# Motivation

We have determined that adding tracer flare to dd-trace-py was the primary cause that pushed the library size limit over what is acceptable for datadog-lambda-python.

We found that `zip` was including all compression methods by default which take up a lot of space and are unused.

```
# Before
❯ ls -hal target/release/libdatadog_tracer_flare.*
-rw-r--r--@ 1 brett.langdon  staff   7.3K Mar 18 12:01 target/release/libdatadog_tracer_flare.d
-rw-r--r--@ 1 brett.langdon  staff   3.6M Mar 18 12:01 target/release/libdatadog_tracer_flare.rlib

# After
❯ ls -hal target/release/libdatadog_tracer_flare.*
-rw-r--r--@ 1 brett.langdon  staff   7.3K Mar 18 12:02 target/release/libdatadog_tracer_flare.d
-rw-r--r--@ 1 brett.langdon  staff   3.3M Mar 18 12:00 target/release/libdatadog_tracer_flare.rlib
```

# Additional Notes

Anything else we should know when reviewing?

# How to test the change?

Describe here in detail how the change can be validated.


Co-authored-by: brett.langdon <brett.langdon@datadoghq.com>

Author: brettlangdon