Add instrumentation and distro packages (#738)

Now that SDK does not depend on opentelemetry-instrumentation
anymore and opentelemetry-instrumentation has actual build time
dependencies on the contrib repo, it makes maintanence a lot
easier if we move opentelemetry-instrumentation to contrib repo.
opentelemetry-distro depends on opentelemetry-instrumentation
and is being moved as well. Neither of the two packages are
really part of "core" Otel python anyway.

scripts/generate_instrumentation_bootstrap.py

@@ -15,17 +15,18 @@
 # limitations under the License.
 
 import ast
-import filecmp
 import logging
 import os
 import subprocess
 import sys
-import tempfile
 
 import astor
 import pkg_resources
-import requests
-from otel_packaging import get_instrumentation_packages, scripts_path
+from otel_packaging import (
+    get_instrumentation_packages,
+    root_path,
+    scripts_path,
+)
 
 logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger("instrumentation_list_generator")
@@ -49,16 +50,14 @@ libraries = {}
 default_instrumentations = []
 """
 
-tmpdir = tempfile.TemporaryDirectory()  # pylint: disable=R1732
-gen_path = os.path.join(tmpdir.name, "new.py",)
-
-current_path = os.path.join(tmpdir.name, "current.py",)
-
-core_repo = os.getenv("CORE_REPO_SHA", "main")
-url = f"https://raw.githubusercontent.com/open-telemetry/opentelemetry-python/{core_repo}/opentelemetry-instrumentation/src/opentelemetry/instrumentation/bootstrap_gen.py"
-r = requests.get(url, allow_redirects=True)
-with open(current_path, "wb") as output:
-    output.write(r.content)
+gen_path = os.path.join(
+    root_path,
+    "opentelemetry-instrumentation",
+    "src",
+    "opentelemetry",
+    "instrumentation",
+    "bootstrap_gen.py",
+)
 
 
 def main():
@@ -98,7 +97,7 @@ def main():
             "scripts/eachdist.py",
             "format",
             "--path",
-            tmpdir.name,
+            "opentelemetry-instrumentation/src",
         ],
         check=True,
     )
@@ -106,15 +105,5 @@ def main():
     logger.info("generated %s", gen_path)
 
 
-def compare():
-    if not filecmp.cmp(current_path, gen_path):
-        logger.info(
-            'Generated code is out of date, please run "tox -e generate" and commit bootstrap_gen.py to core repo.'
-        )
-        os.replace(gen_path, "bootstrap_gen.py")
-        sys.exit(1)
-
-
 if __name__ == "__main__":
     main()
-    compare()