Report runtime init errors to localstack

[dominikschubert]

Changes

• Fix shutdown and remove unused profiler (Previously the http server was blocking until the process was killed. Now it is properly ended after receiving a registered signal, i.e. SIGINT or SIGTERM)
• Report runtime init error back to localstack

Example for the init report arriving at localstack

2023-03-29T21:53:39.854 WARNING --- [   asgi_gw_1] localstack.services.awslambda.invocation.executor_endpoint : Execution environment startup failed: {"errorMessage": "ooooooh no", "errorType": "Exception", "stackTrace": ["  File \"/var/lang/lib/python3.8/imp.py\", line 234, in load_module\n    return load_source(name, filename, file)\n", "  File \"/var/lang/lib/python3.8/imp.py\", line 171, in load_source\n    module = _load(spec)\n", "  File \"<frozen importlib._bootstrap>\", line 702, in _load\n", "  File \"<frozen importlib._bootstrap>\", line 671, in _load_unlocked\n", "  File \"<frozen importlib._bootstrap_external>\", line 843, in exec_module\n", "  File \"<frozen importlib._bootstrap>\", line 219, in _call_with_frames_removed\n", "  File \"/var/task/handler.py\", line 4, in <module>\n    raise Exception(\"ooooooh no\")\n"]}

The init error above is caused by directly raising an exception outside of the python handler.

[joe4dev]

Error reporting works nicely 👍 and is very useful.

Tested both cases:
a) provoking error from RIE by omitting "_HANDLER"
b) raising Error in Nodejs runtime outside handler function provides a helpful error message in LocalStack now:

2023-03-29T22:40:07.439  WARN --- [   asgi_gw_0] l.s.a.i.executor_endpoint  : Execution environment startup failed: {"errorType":"Error","errorMessage":"MY RUNTIME BREAKS NOW!","trace":["Error: MY RUNTIME BREAKS NOW!","    at Object.<anonymous> (/var/task/index.js:19:7)","    at Module._compile (internal/modules/cjs/loader.js:1114:14)","    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1143:10)","    at Module.load (internal/modules/cjs/loader.js:979:32)","    at Function.Module._load (internal/modules/cjs/loader.js:819:12)","    at Module.require (internal/modules/cjs/loader.js:1003:19)","    at require (internal/modules/cjs/helpers.js:107:18)","    at _tryRequireFile (/var/runtime/UserFunction.js:72:32)","    at _tryRequire (/var/runtime/UserFunction.js:160:20)","    at _loadUserApp (/var/runtime/UserFunction.js:219:12)"]}