Provide a way to ignore portions of the signature for cache key calcu…

[troychiu]

Tracking issue

Closes #3058

Describe your changes

1. add cache_ignore_input_vars as a field of TaskMetadata
2. change the signature of GenerateArtifactTagName to GenerateArtifactTagName(ctx context.Context, inputs *core.LiteralMap, cacheIgnoreInputVars *[]string)
3. when cacheIgnoreInputVars provided, skip all input variables in it for hash calculation

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Screenshots

Note to reviewers

The local version is here: flyteorg/flytekit#1914

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (956b24e) 59.81% compared to head (30d534c) 59.83%.

Files	Patch %	Lines
flytepropeller/pkg/controller/nodes/task/cache.go	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4324      +/-   ##
==========================================
+ Coverage   59.81%   59.83%   +0.01%     
==========================================
  Files         632      632              
  Lines       53644    53655      +11     
==========================================
+ Hits        32089    32102      +13     
+ Misses      19029    19028       -1     
+ Partials     2526     2525       -1     

Flag	Coverage Δ
unittests	59.83% <77.27%> (+0.01%)	⬆️

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[hamersaw]

Rather than creating a new LiteralMap here would it make more sense to pass the cacheIgnoreInputVars to the HashLiteralMap function. Then in this code here we just need to update to:

	for name, literal := range literalMap.Literals {
	        if !slices.Contains(cacheIgnoreInputVars, name) {
		    hashifiedLiteralMap[name] = hashify(literal)
		}
	}

This achieves the same outcome in 2 LoC rather than 12. I think it makes more sense to only create a new LiteralMap in one place as well.

[hamersaw]

Closing as satisfied by #4618