Moving get_bindings_registry to static list

[gavin-aguiar]

Description

Fixes #1179

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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

• [ ] I have read the contribution guidelines.

[codecov[bot]]

Codecov Report

Merging #1197 (c67afce) into dev (c403eab) will decrease coverage by 52.42%. The diff coverage is 42.85%.

:exclamation: Current head c67afce differs from pull request most recent head 774ecea. Consider uploading reports for the commit 774ecea to get more accurate results

@@             Coverage Diff             @@
##              dev    #1197       +/-   ##
===========================================
- Coverage   84.42%   32.00%   -52.42%     
===========================================
  Files          34       34               
  Lines        1900     1903        +3     
  Branches      366      366               
===========================================
- Hits         1604      609      -995     
- Misses        229     1293     +1064     
+ Partials       67        1       -66     

Flag	Coverage Δ
unittests	32.00% <42.85%> (-52.37%)	:arrow_down:

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

Impacted Files	Coverage Δ
azure_functions_worker/dispatcher.py	19.44% <0.00%> (-69.65%)	:arrow_down:
azure_functions_worker/bindings/meta.py	26.19% <50.00%> (-58.15%)	:arrow_down:
azure_functions_worker/bindings/__init__.py	100.00% <100.00%> (ø)

... and 22 files with indirect coverage changes

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