Added worker metadata to init and reload response

[gavin-aguiar]

Description

Added worker metadata to WorkerInitResponse and FunctionEnvironmentReloadResponse

Fixes #1057

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PR information

• The title of the PR is clear and informative.
• There are a small number of commits, each of which has an informative message. This means that previously merged commits do not appear in the history of the PR. For information on cleaning up the commits in your pull request, see this page.
• If applicable, the PR references the bug/issue that it fixes in the description.
• New Unit tests were added for the changes made and CI is passing.

Quality of Code and Contribution Guidelines

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[codecov]

Codecov Report

Merging #1166 (1428412) into dev (d7e5c84) will decrease coverage by 51.96%.
The diff coverage is 75.00%.

❗ Current head 1428412 differs from pull request most recent head eed67bb. Consider uploading reports for the commit eed67bb to get more accurate results

@@             Coverage Diff             @@
##              dev    #1166       +/-   ##
===========================================
- Coverage   83.87%   31.92%   -51.96%     
===========================================
  Files          34       34               
  Lines        1885     1889        +4     
  Branches      362      275       -87     
===========================================
- Hits         1581      603      -978     
- Misses        233     1285     +1052     
+ Partials       71        1       -70     

Flag	Coverage Δ
unittests	31.92% <75.00%> (-51.90%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
azure_functions_worker/protos/__init__.py	100.00% <ø> (ø)
azure_functions_worker/dispatcher.py	19.74% <75.00%> (-69.12%)	⬇️
...e_functions_worker/bindings/nullable_converters.py	21.62% <0.00%> (-78.38%)	⬇️
azure_functions_worker/functions.py	25.00% <0.00%> (-71.28%)	⬇️
azure_functions_worker/utils/tracing.py	31.81% <0.00%> (-68.19%)	⬇️
azure_functions_worker/utils/common.py	33.33% <0.00%> (-66.67%)	⬇️
.../shared_memory_data_transfer/file_accessor_unix.py	19.60% <0.00%> (-57.85%)	⬇️
azure_functions_worker/bindings/meta.py	25.30% <0.00%> (-57.84%)	⬇️
...s/shared_memory_data_transfer/shared_memory_map.py	28.57% <0.00%> (-55.36%)	⬇️
... and 16 more

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[YunchuWang]

#1057

[vrdmr]

Please add the test to check values within Metadata.

LGTM otherwise.