local cache ignore portion

[troychiu]

TL;DR

Users can specify input vars that will not be included when calculating cache

Type

• Bug Fix
• Feature
• Plugin

Are all requirements met?

• Code completed
• Smoke tested
• Unit tests added
• Code documentation added
• Any pending items have an associated Issue

Complete description

1. Add "cache_ignore_input_vars" to task's metadata
2. Check if an input var is in the cache_ignore_input_vars while calculating the hash for cache, skip the input var if yes.

Tracking Issue

flyteorg/flyte#3058

Follow-up issue

Have to implement the same thing for remote cache

[codecov]

Codecov Report

Attention: 14 lines in your changes are missing coverage. Please review.

Comparison is base (e41ec1e) 94.95% compared to head (fd86070) 39.92%.

❗ Current head fd86070 differs from pull request most recent head 2b73159. Consider uploading reports for the commit 2b73159 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #1914       +/-   ##
===========================================
- Coverage   94.95%   39.92%   -55.03%     
===========================================
  Files         136      171       +35     
  Lines        6165    16828    +10663     
  Branches        0     3493     +3493     
===========================================
+ Hits         5854     6719      +865     
- Misses        311     9936     +9625     
- Partials        0      173      +173     

Files	Coverage Δ
flytekit/core/task.py	66.66% <100.00%> (ø)
flytekit/models/task.py	58.77% <50.00%> (ø)
flytekit/core/local_cache.py	39.58% <50.00%> (ø)
flytekit/core/base_task.py	44.77% <11.11%> (ø)

... and 303 files with indirect coverage changes

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[troychiu]

Closing as satisfied by flyteorg/flyte#2275